142 (number)

← 141 142 143 →
← 140 141 142 143 144 145 146 147 148 149 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred forty-two
Ordinal	142nd (one hundred and forty-second)
Factorization	2 × 71
Divisors	1, 2, 71, 142
Roman numeral	CXLII
Binary	100011102
Ternary	120213
Quaternary	20324
Quinary	10325
Senary	3546
Octal	2168
Duodecimal	BA12
Hexadecimal	8E16
Vigesimal	7220
Base 36	3Y36

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

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

${\displaystyle {\frac {142^{1231}-1}{141}}}$ 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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