42 (Number)

42 is the natural number following 41 and followed by 43.
Cardinal forty-two
Ordinal42nd (forty-second)
Factorization2 \times 3 \times 7
Divisors 2, 3, 6, 7, 14, 21
Roman numeralXLII
Binary101010
Hexadecimal2A

In mathematics

This composite number's factorization makes it a sphenic number. It is also the third 15-gonal number, a Catalan number, a meandric number, an open meandric number, a Harshad number and a self number. It is bracketed by twin primes.

In science

  • The atomic number of molybdenum
  • The visual angle between the colored part of a rainbow and the center point of its arc (where your head's shadow would be projected to) is 42 degrees.
  • If you drilled a straight tunnel through any part of the Earth, including (but not limited to) straight through the middle, and let go of an object right at the mouth of the tunnel, the time it would take the object to fall or roll to the other end of the tunnel by gravity alone (assuming no friction) is 42 minutes.
In astronomy,
Messier object M42, a magnitude 5.0 diffuse nebula in the constellation Orion, also known as the Orion Nebula
The New General Catalogue object NGC 42, a spiral galaxy in the constellation Pegasus
The Saros number of the solar eclipse series which began on 1577 BC April 28 and ended on 297 BC June 5. The duration of Saros series 42 was 1280.1 years, and it contained 72 solar eclipses.
The Saros number of the lunar eclipse series which began on 1293 BC January 24 and ended on 59 April 15. The duration of Saros series 42 was 1352.2 years, and it contained 76 lunar eclipses.

In other fields

In religion: Forty-two is also:

 

<< PreviousWord BrowserNext >>
arsenal
jeremiah dixon
local community
the turner diaries
warrior soul
altenburger land
sick of it all
milpa
uss new mexico
autonomy
uss new mexico (bb 40)
future primitive: the new ecotopias
paramecium
monazite
bastnasite
maximilian von spee
self governance
watershed
chytridiomycota
zygomycota
deuteromycota
battle of coronel
homobasidiomycetes
sms scharnhorst
life, the universe and everything
notre dame de grce
james thornhill
avgas
lachine, quebec
homophobic hate speech
uss new york (bb 34)
the experience economy
enterococcus
business philosophies and popular management theories
stephen
emperor go momozono of japan
ipso facto
list of communities in the northwest territories
rigoberta mench
partition
mandarin orange
gold coinage act
low birth weight paradox
ingredient