142 (number)


142 is the natural number following 141 and preceding 143.

In mathematics

There is no answer to the equation φ = 142, making 142 a nontotient. There are 142 planar graphs with 6 unlabeled vertices.
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.

In astrophysics

In literature and publications

*