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From Wikipedia, the free encyclopedia

142 (one hundred [and] forty-two) is the natural number following 141 and preceding 143.

In mathematics

There is no answer to the equation φ(x) = 142, making 142 a nontotient. There are 142 planar graphs with 6 unlabeled vertices.[1]

is the smallest repunit prime in base 142, it has 2648 digits, while the smallest repunit prime in negative base -142 is only 20023. Besides, the smallest Fermat prime in base 142 is 406586897, and the smallest Wieferich prime in base 142 is 143111.

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See also


  1. ^ Erich Friedman, "What's Special About This Number": 142. Accessed 5 JAN 2008.
This page was last edited on 28 February 2019, at 02:59
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