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# 142 (number)

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 Title: 142 (number) Author: World Heritage Encyclopedia Language: English Subject: Collection: Integers Publisher: World Heritage Encyclopedia Publication Date:

### 142 (number)

 ← 141 142 143 →
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
Vigesimal 7220
Base 36 3Y36

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

## Contents

• In mathematics 1
• In astrophysics 2
• In business and accounting 3
• In chemistry 4
• In geography 5
• In media 6
• In literature and publications 6.1
• In the military 7
• In music 8
• In timekeeping 9
• In transportation 10
• In other uses 11
• References 13

## 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]

\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.

## In music

• TXC142 Drum and Bass producer from the UK
• The song “142” by Crackout on their 2002 This Is Really Neat CD