100,000

"100000" redirects here. For other uses, see 100000 (disambiguation).

100,000 (one hundred thousand) is the natural number following 99,999 and preceding 100,001. In scientific notation, it is written as 10⁵.

Terms for 100,000

In India, Pakistan and South Asia, one hundred thousand is called a lakh, and is written as 1,00,000. The Thai, Lao, Khmer and Vietnamese languages also have separate words for this number: แสน, ແສນ, សែន (all saen), and ức respectively. The Malagasy word is hetsy. No other major language has a special word for this number, preferring to refer to it as a multiple of smaller numbers.

In Cyrillic numerals, it is known as the legion (легион): or .

Values of 100,000

In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Fédération Aéronautique Internationale (FAI) defines spaceflight to begin.

In the Irish language, céad míle fáilte (pronounced [ˌceːd̪ˠ ˈmʲiːlʲə ˈfˠaːlʲtʲə]) is a popular greeting meaning "a hundred thousand welcomes".

Selected 6-digit numbers (100,001–999,999)

100,001 to 199,999

100,001 to 109,999

• 100,003 – smallest 6-digit prime number
• 100,128 – smallest triangular number with 6 digits and the 447th triangular number
• 100,255 – Friedman number
• 101,101 – smallest palindromic Carmichael number
• 101,723 – smallest prime number whose square is a pandigital number containing each digit from 0 to 9
• 102,564 – The smallest parasitic number
• 103,680 – highly totient number
• 103,769 – the number of combinatorial types of 5-dimensional parallelohedra
• 103,823 – 47³, nice Friedman number (−1 + 0 + 3×8×2)³
• 104,723 – the 9,999th prime number
• 104,729 – the 10,000th prime number
• 104,869 – the smallest prime number containing every non-prime digit
• 104,976 – 18⁴, 3-smooth number
• 105,664 – harmonic divisor number
• 109,376 - 1-automorphic number

110,000 to 119,999

• 110,880 – highly composite number
• 111,111 – repunit
• 111,777 – smallest natural number requiring 17 syllables in American English, 19 in British English
• 113,634 – Motzkin number for n = 14
• 114,243/80,782 ≈ √2
• 114,689 – prime factor of F₁₂
• 115,975 – Bell number
• 116,281 – 341², square number, centered decagonal number, 18-gonal number
• 117,067 – first vampire prime
• 117,649 – 7⁶
• 117,800 – harmonic divisor number

120,000 to 149,999

• 120,284 – Keith number
• 120,960 – highly totient number
• 121,393 – Fibonacci number
• 124,000 – number of Islamic prophets
• 127,777 – smallest natural number requiring 18 syllables in American English, 20 in British English
• 127,912 – Wedderburn–Etherington number
• 128,981 – Starts the first prime gap sequence of 2, 4, 6, 8, 10, 12, 14
• 129,106 – Keith number
• 130,321 – 19⁴
• 131,071 – Mersenne prime
• 131,072 – 2¹⁷
• 131,361 – Leyland number
• 134,340 – Pluto's minor planet designation
• 135,137 – Markov number
• 142,129 – 377², square number, dodecagonal number
• 142,857 – Kaprekar number, Harshad number smallest cyclic number in decimal.
• 144,000 – number with religious significance
• 147,640 – Keith number
• 148,149 – Kaprekar number

150,000 to 199,999

• 152,381 – unique prime in base 20
• 156,146 – Keith number
• 160,000 – 20⁴
• 161,051 – 11⁵
• 161,280 – highly totient number
• 166,320 – highly composite number
• 167,400 – harmonic divisor number
• 173,600 – harmonic divisor number
• 174,680 – Keith number
• 174,763 – Wagstaff prime
• 177,147 – 3¹¹
• 177,777 – smallest natural number requiring 19 syllables in American English, 21 in British English
• 178,478 – Leyland number
• 181,440 – highly totient number
• 181,819 – Kaprekar number
• 183,186 – Keith number
• 187,110 – Kaprekar number
• 194,481 – 21⁴
• 195,025 – Pell number, Markov number
• 196,418 – Fibonacci number, Markov number
• 196,560 – the kissing number in 24 dimensions
• 196,883 – the dimension of the smallest nontrivial irreducible representation of the Monster group
• 196,884 – the coefficient of q in the Fourier series expansion of the j-invariant. The adjacency of 196883 and 196884 was important in suggesting monstrous moonshine.

200,000 to 299,999

• 206,265 – rounded number of arc seconds in a radian (see also parsec), since ⁠180 × 60 × 60/π⁠ = 206,264.806...
• 207,360 – highly totient number
• 208,012 – the Catalan number C₁₂
• 208,335 – the largest number to be both triangular and square pyramidal
• 208,495 – Kaprekar number
• 212,159 – smallest unprimeable number ending in 1, 3, 7 or 9
• 221,760 – highly composite number
• 222,222 – repdigit
• 234,256 – 22⁴
• 237,510 – harmonic divisor number
• 241,920 – highly totient number
• 242,060 – harmonic divisor number
• 248,832 – 12⁵, the smallest fifth power that can be represented as the sum of only 6 fifth powers: 12⁵ = 4⁵ + 5⁵ + 6⁵ + 7⁵ + 9⁵ + 11⁵
• 262,144 – 2¹⁸; exponential factorial $4 of 4; a superperfect number
• 262,468 – Leyland number
• 268,705 – Leyland number
• 274,177 – prime factor of the Fermat number F₆
• 275,807/195,025 ≈ √2
• 277,200 – highly composite number
• 279,841 – 23⁴
• 279,936 – 6⁷
• 280,859 – a prime number whose square 78881777881 is tridigital
• 293,547 – Wedderburn–Etherington number
• 294,001 – smallest weakly prime number in base 10
• 294,685 – Markov number
• 298,320 – Keith number

300,000 to 399,999

• 310,572 – Motzkin number
• 317,811 – Fibonacci number
• 318,682 – Kaprekar number
• 326,981 – alternating factorial
• 329,967 – Kaprekar number
• 331,776 – 24⁴
• 332,640 – highly composite number; harmonic divisor number
• 333,333 – repdigit
• 333,667 – sexy prime and unique prime
• 333,673 – sexy prime with 333,679
• 333,679 – sexy prime with 333,673
• 337,500 – 2² × 3³ × 5⁵
• 351,351 – only known odd abundant number that is not the sum of some of its proper, nontrivial (i.e. >1) divisors (sequence A122036 in the OEIS).
• 351,352 – Kaprekar number
• 355,419 – Keith number
• 356,643 – Kaprekar number
• 360,360 – harmonic divisor number; the smallest number divisible by all of the numbers 1 through 15
• 362,880 – 9!, highly totient number
• 370,261 – first prime followed by a prime gap of over 100
• 371,293 – 13⁵, palindromic in base 12 (15AA51₁₂)
• 389,305 – self-descriptive number in base 7
• 390,313 – Kaprekar number
• 390,625 – 5⁸
• 397,585 – Leyland number

400,000 to 499,999

• 409,113 – sum of the first nine factorials
• 422,481 – smallest number whose fourth power is the sum of three smaller fourth powers
• 423,393 – Leyland number
• 426,389 – Markov number
• 426,569 – cyclic number in base 12
• 437,760 to 440,319 – any of these numbers will cause the Apple II+ and Apple IIe computers to crash to a monitor prompt when entered at the BASIC prompt, due to a short-cut in the Applesoft code programming of the overflow test when evaluating 16-bit numbers. Entering 440000 at the prompt has been used to hack games that are protected against entering commands at the prompt after the game is loaded.
• 444,444 – repdigit
• 456,976 – 26⁴
• 461,539 – Kaprekar number
• 466,830 – Kaprekar number
• 470,832 – Pell number
• 483,840 – highly totient number
• 498,960 – highly composite number
• 499,393 – Markov number
• 499,500 – Kaprekar number

500,000 to 599,999

• 500,500 – Kaprekar number, sum of first 1,000 integers
• 509,203 – Riesel number
• 510,510 – the product of the first seven prime numbers, thus the seventh primorial. It is also the product of four consecutive Fibonacci numbers—13, 21, 34, 55, the highest such sequence of any length to be also a primorial. And it is a double triangular number, the sum of all even numbers from 0 to 1428.
• 514,229 – Fibonacci prime, Markov prime
• 524,287 – Mersenne prime
• 524,288 – 2¹⁹
• 524,649 – Leyland number
• 531,441 – 3¹²
• 533,169 – Leyland number
• 533,170 – Kaprekar number
• 537,824 – 14⁵
• 539,400 – harmonic divisor number
• 548,834 – equal to the sum of the sixth powers of its digits
• 554,400 – highly composite number
• 555,555 – repdigit

600,000 to 699,999

• 604,800 – number of seconds in a week
• 614,656 – 28⁴
• 646,018 – Markov number
• 665,280 – highly composite number
• 665,857/470,832 ≈ √2
• 666,666 – repdigit
• 676,157 – Wedderburn–Etherington number
• 678,570 – Bell number
• 694,280 – Keith number
• 695,520 – harmonic divisor number

700,000 to 799,999

• 707,281 – 29⁴
• 720,720 – superior highly composite number; colossally abundant number; the smallest number divisible by all the numbers 1 through 16
• 725,760 – highly totient number
• 726,180 – harmonic divisor number
• 742,900 – Catalan number
• 753,480 – harmonic divisor number
• 759,375 – 15⁵
• 765,623 – emirp, Friedman prime 5⁶ × 7² − 6 ÷ 3
• 777,777 – repdigit, smallest natural number requiring 20 syllables in American English, 22 in British English

800,000 to 899,999

• 810,000 – 30⁴
• 823,543 – 7⁷
• 825,265 – smallest Carmichael number with 5 prime factors
• 832,040 – Fibonacci number
• 853,467 – Motzkin number
• 873,612 – 1¹ + 2² + 3³ + 4⁴ + 5⁵ + 6⁶ + 7⁷
• 888,888 – repdigit
• 890,625 – 1-automorphic number

900,000 to 999,999

"999999" redirects here. For the string of nines in pi, see Six nines in pi.

• 909,091 – unique prime in base 10
• 923,521 – 31⁴
• 925,765 – Markov number
• 925,993 – Keith number
• 950,976 – harmonic divisor number
• 967,680 – highly totient number
• 998,991 – highest triangular number with 6 digits and the 1,413th triangular number
• 999,983 – largest 6-digit prime number
• 999,999 – repdigit. Rational numbers with denominators 7 and 13 have 6-digit repetends when expressed in decimal form, because 999999 is divisible by 7 and by 13.