242 (number)

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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,

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

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

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