242 (number): Difference between revisions

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Cardinal	two hundred forty-two
Ordinal	242nd; (two hundred forty-second)
Factorization	2 × 112
Greek numeral	ΣΜΒ´
Roman numeral	CCXLII
Binary	111100102
Ternary	222223
Senary	10426
Octal	3628
Duodecimal	18212
Hexadecimal	F216

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Latest revision as of 17:31, 9 June 2024

242 (two hundred [and] forty-two) is the natural number following 241 and preceding 243.

242 is the smallest integer to start a run of four consecutive integers with the same number of divisors.^[1]^[2]

242 is a nontotient since there is no integer with 242 coprimes below it.

242 is a palindrome.

242 is the number of parallelogram polyominoes with 8 cells.^[3]

242 is the difference between 355 and 113, two numbers used in an approximation of pi,

${\frac {355}{113}}=3.14159292035\ldots$

(This fraction is slightly larger than $\pi$ , by a factor of around $0.000000266764\dots$ )

242 is the sum of elements in a 5-orthoplex: 32 polychora, 80 cells, 80 faces, 40 edges, and 10 vertices.

References

^ R. K. Guy Unsolved Problems in Number Theory, section B18.
^ D. Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, NY, 1986: 147, 176.
^ Sloane, N. J. A. (ed.). "Sequence A006958 (Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.

This article about a number is a stub. You can help Wikipedia by expanding it.

[1] R. K. Guy Unsolved Problems in Number Theory, section B18.

[2] D. Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, NY, 1986: 147, 176.

[3] Sloane, N. J. A. (ed.). "Sequence A006958 (Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.

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@@ Line 4: / Line 4: @@
 }}
 '''242''' ('''two hundred [and] forty-two''') is the [[natural number]] following [[241 (number)|241]] and preceding [[243 (number)|243]].
-==In mathematics==
 is the smallest integer to start a run of four consecutive integers with the same number of divisors.<ref>R. K. Guy ''Unsolved Problems in Number Theory'', section B18.</ref><ref>D. Wells, ''[[The Penguin Dictionary of Curious and Interesting Numbers]],'' Penguin Books, NY, 1986: 147, 176.</ref>
@@ Line 13: / Line 11: @@
 is a [[palindrome]].
+is the number of parallelogram polyominoes with 8 cells.<ref>{{cite OEIS|A006958|Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused)}}</ref>
-==In other fields==
-is also:
+is the difference between [[355 (number)|355]] and [[113 (number)|113]], two numbers used in an [[approximation]] of [[pi]],
-* part of the name of a Belgian [[electronic body music]] group called [[Front 242]]
-* the number of a notable UN Security Council resolution pertaining to the Arab/Israeli conflict, [[United Nations Security Council Resolution 242]]
+<math>\frac {355}{113} = 3.14159292035 \ldots</math>
-* [[Area code 242]] is the [[telephone numbering plan|area code]] of [[The Bahamas]] located in the North West Atlantic Ocean.
-* [[Volvo 242]] (2xx-series, 4-cylinder, 2-door) Produced from 1974–1984.
+(This fraction is slightly larger than <math>\pi</math>, by a factor of around <math>0.000000266764\dots</math>)
-* [[Fiat 242]], a van produced by Fiat
-* the total number of [http://www.mariowiki.com/Power_Star Power Stars] a player can collect in ''[[Super Mario Galaxy]]'' and ''[[Super Mario Galaxy 2]]'' for the [[Wii]].
+is the sum of [[Polytope#Elements|elements]] in a [[5-orthoplex]]: 32 [[polychora]], 80 [[Polytope#Elements|cells]], 80 [[Face (geometry)|faces]], 40 [[Edge (geometry)|edges]], and 10 [[Vertex (geometry)|vertices]].
-* the orbit, in days, of [[Kepler-69c]], a planet 70 percent larger than the size of Earth, orbiting in the habitable zone of a star similar to our sun. Astronomers are uncertain about the composition of Kepler-69c, but its orbit of 242 days around a sun-like star resembles that of our neighboring planet Venus.
-* [[2-4-2]], a [[Whyte notation]] classification of [[steam locomotive]].
 ==References==