74 (number)

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

In mathematics

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 (74,40,43,1,0).
• 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

• The atomic number of tungsten

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:

• The year AD 74, 74 BC, or 1974
• Designates the 7400 series of Integrated Chips. 74xx xx=00-4538
• The designation of USA Interstate 74, a freeway that runs from Iowa to Ohio
• A seventy-four was a third-rate warship with 74 guns.
• The registry of the U.S. Navy's nuclear aircraft carrier USS John C. Stennis (CVN-74), named after U.S. Senator John C. Stennis
• A hurricane or typhoon is a system with sustained winds of at least 74 MPH
• Municipal Okrug #74, name of Georgiyevsky Municipal Okrug of Frunzensky District of Saint Petersburg, Russia, before 2008
• The number of the French department Haute-Savoie

References