242 (number)

241 242 243
Cardinal two hundred forty-two
Ordinal 242nd
(two hundred and forty-second)
Factorization 2 × 112
Roman numeral CCXLII
Binary 111100102
Ternary 222223
Quaternary 33024
Quinary 14325
Senary 10426
Octal 3628
Duodecimal 18212
Hexadecimal F216
Vigesimal C220
Base 36 6Q36

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:


  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.
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