161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.
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.
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
The Bose 161 Speaker System (2001)
The Kay K-161 ThinTwin guitar
MTA Maryland commuter bus 161
Seattle Metro bus route 161
London Bus route 161
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
