Harman Patil (Editor)

161 (number)

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161
  
162 →

Factorization
  
7 × 23

Roman numeral
  
CLXI

Cardinal
  
one hundred sixty-one

Divisors
  
1, 7, 23, 161

Ordinal
  
161st(one hundred and sixty-first)

161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.

Contents

In mathematics

161 is the sum of five consecutive prime numbers: 23, 29, 31, 37, and 41

161 is a hexagonal pyramidal number.

161 is a semiprime. Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer.

In the military

  • USNS Lone Jack (T-AO-161) was a U.S. Navy Type T2 tanker during World War II
  • USS Barber (DE-161) was a U.S. Navy Buckley-class destroyer escort during World War II
  • USS Barite (IX-161) was a U.S. Navy Trefoil-class concrete barge during World War II
  • USS Beaverhead (AK-161) was a U.S. Navy Alamosa-class cargo ship during World War II
  • USS Climax (AM-161) was a U.S. Navy Admirable-class minesweeper during World War II
  • USS Dickens (APA-161) was a U.S. Navy Haskell-class attack transport during World War II
  • USS Narada (SP-161) was a U.S. Navy wooden yacht during World War I
  • USS Palmer (DD-161) was a U.S. Navy Wickes-class destroyer during World War II
  • USS Salinan (ATF-161) was a U.S. Navy Achomawi fleet ocean tug following World War II
  • USS S-50 (SS-161) was a U.S. Navy fourth-group S-class submarine between 1920 and 1931
  • USS Stingray (SS-161) is a fictional U.S. Navy diesel engine submarine featured in the 1996 film Down Periscope
  • The 161st Intelligence Squadron unit of the Kansas Air National Guard. Its parent unit is the 184th Intelligence Wing

    • In music

  • The Bose 161 Speaker System (2001)
  • The Kay K-161 ThinTwin guitar

    • In transportation

  • MTA Maryland commuter bus 161
  • Seattle Metro bus route 161
  • London Bus route 161

    • In other fields

    161 is also:

  • The year AD 161 or 161 BC
  • 161 AH is a year in the Islamic calendar that corresponds to 777 – 778 CE
  • The atomic number of an element temporarily called Unhexunium
  • 161 Athor is an M-type Main belt asteroid
  • E.161 is an ITU-T assigns letters to the 12-key telephone keypad
  • Fiorina Fury 161 is a foundry facility and penal colony from the film Alien 3

    • References

    161 (number) Wikipedia
    (Text) CC BY-SA


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