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142 (number)

← 141 142 143 →
Cardinalone hundred forty-two
Ordinal142nd
(one hundred forty-second)
Factorization2 × 71
Divisors1, 2, 71, 142
Greek numeralΡΜΒ´
Roman numeralCXLII
Binary100011102
Ternary120213
Quaternary20324
Quinary10325
Senary3546
Octal2168
DuodecimalBA12
Hexadecimal8E16
Vigesimal7220
Base 363Y36

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.

In astrophysics

In business and accounting

In chemistry

In geography

In media

In literature and publications

In the military

In music

In timekeeping

In transportation

In other uses

See also

References

  1. ^ Erich Friedman, "What's Special About This Number": 142. Accessed 5 JAN 2008.