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In other fields: I added another field where the number 242 is important.
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* 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.
* 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]].
* [[2-4-2]], a [[Whyte notation]] classification of [[steam locomotive]].
*the number of ways to make change for a us dollar if only using quarters, dimes, nickles and penny's


==References==
==References==
{{reflist}}
{{reflist}}3. Austin McConnell, A Solid 20 Minutes of Useless Information, YouTube, Oct 30, 2020: 13:14 https://www.youtube.com/watch?v=g2mLOVHZ2u4


{{Integers|2}}
{{Integers|2}}

Revision as of 17:31, 12 November 2020

← 241 242 243 →
Cardinaltwo hundred forty-two
Ordinal242nd
(two hundred forty-second)
Factorization2 × 112
Greek numeralΣΜΒ´
Roman numeralCCXLII
Binary111100102
Ternary222223
Senary10426
Octal3628
Duodecimal18212
HexadecimalF216

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

In mathematics

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.

In other fields

242 is also:

References

  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.