Jump to content

242 (number)

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by PrimeFan (talk | contribs) at 23:05, 21 November 2006 (Added references placeholder). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

242 is the natural number following 241 and preceding 243.

Template:Numbers 0-1000
CardinalTwo hundred [and] forty two
Ordinal242nd
Factorization
Roman numeralCCXLII
Binary11110010
HexadecimalF2

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.