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74 (number)

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Title: 74 (number)  
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Subject: Prime factor exponent notation, 495 (number), 420 (number), 801 (number), 359 (number)
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74 (number)

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

Contents

  • In mathematics 1
  • In science 2
  • In music 3
  • In bus routes 4
  • In other fields 5

In mathematics

74 is the twenty-first distinct semiprime and the eleventh of the form 2×q. The aliquot sum of 74 is 40 within the aliquot sequence (74,40,43,1,0) 74 being the sixth composite number in the 43-aliquot tree.

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

In science

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

Rock & Roll

  • 74th St Band
  • Piece by John Cage

In bus routes

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

Seventy-four is also:

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