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 forty-second)
Factorization	2 × 71
Divisors	1, 2, 71, 142
Greek numeral	ΡΜΒ´
Roman numeral	CXLII
Binary	100011102
Ternary	120213
Senary	3546
Octal	2168
Duodecimal	BA12
Hexadecimal	8E16

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

In mathematics

There are 142 connected functional graphs on four labeled vertices,^[1] 142 planar graphs with 6 unlabeled vertices,^[2] and 142 partial involutions on five elements.^[3]

In architecture

The Gateway Arch in St. Louis, Missouri was constructed with 142^[4] prefabricated triangular sections.

In literature

In the Harry Potter Series of books, It is noted in 'The Philosopher's Stone' that There are 142 staircases in Hogwarts Castle (ch.8).

See also

• The year AD 142 or 142 BC
• List of highways numbered 142
• All pages with titles containing 142

References

1. Sloane, N. J. A. (ed.). "Sequence A001865 (Number of connected functions on n labeled nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. Sloane, N. J. A. (ed.). "Sequence A005470 (Number of unlabeled planar simple graphs with n nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. Sloane, N. J. A. (ed.). "Sequence A005425". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
4. Langmead, Donald; Garnaut, Christine (2001). Encyclopedia of Architectural and Engineering Feats. Santa Barbara, CA: ABC-CLIO. pp. 130–131. ISBN 978-1-57607-112-0.