74 (number)

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← 73 74 75 →
Cardinal seventy-four
Ordinal 74th
Factorization 2 × 37
Divisors 1, 2, 37, 74
Roman numeral LXXIV
Binary 10010102
Ternary 22023
Quaternary 10224
Quinary 2445
Senary 2026
Octal 1128
Duodecimal 6212
Hexadecimal 4A16
Vigesimal 3E20
Base 36 2236

74 (seventy-four) is the natural number following 73 and preceding 75.

In mathematics[edit]

74 is:

  • the twenty-first distinct semiprime and the eleventh of the form 2×q.
  • the sixth composite number in the 43-aliquot tree. The aliquot sum of 74 is 40 within the aliquot sequence (74,40,50,43,1,0).
  • a palindromic number in bases 6 (2026) and 36 (2236).
  • a nontotient.[1]

There are 74 different non-Hamiltonian polyhedra with a minimum number of vertices.

In science[edit]

In astronomy,

Messier object M74, a magnitude 10.5 spiral galaxy in the constellation Pisces.
The New General Catalogue object NGC 74, a galaxy in the constellation Andromeda.
The Saros number of the solar eclipse series which began on -615 August 8 and ended on 719 October 18. The duration of Saros series 74 was 1334.2 years, and it contained 75 solar eclipses.
The Saros number of the lunar eclipse series which began on -331 May 7 and ended on 949 June 13. The duration of Saros series 74 was 1280.1 years, and it contained 72 lunar eclipses.

In music[edit]

Rock & Roll

In bus routes[edit]

In the Merseyside, England, Seventy-four is the bus route that runs from Halewood to Liverpool Town Centre.

In Chicago, "74" is the Fullerton bus which runs from Lincoln Park to Belmont Cragin.

London Buses route 74 is a Transport for London contracted bus route in London, England. Running between Baker Street station and Putney, it is operated by London General.

In other fields[edit]

Seventy-four is also:


  1. ^ "Sloane's A005277 : Nontotients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.