| 释义 |
- In mathematics
- In the military
- In music
- In transportation
- In other fields
- See also
- External links
- References
{{example farm|date=September 2018}}{{Infobox number
| number = 161
| divisor=1, 7, 23, 161
}}161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162. In mathematics161 is the sum of five consecutive prime numbers: 23, 29, 31, 37, and 41 161 is a hexagonal pyramidal number.[1] 161 is a semiprime. Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer. 161 is a palindromic number [2] 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 {{sclass-|Buckley|destroyer escort|1}} 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 {{sclass-|Alamosa|cargo ship|1}} during World War II
- {{USS|Climax|AM-161}} was a U.S. Navy {{sclass-|Admirable|minesweeper|1}} during World War II
- {{USS|Dickens|APA-161}} was a U.S. Navy {{sclass-|Haskell|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 {{sclass-|Wickes|destroyer|1}} during World War II
- {{USS|Salinan|ATF-161}} was a U.S. Navy Achomawi-class 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 [https://web.archive.org/web/20060929004307/http://transit.metrokc.gov/tops/bus/schedules/s161_0_.html Metro bus route 161]
- London Bus route 161
In other fields161 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
- 161 is used by Anti Fascist Action as a code for AFA (A=1, F=6, by order of the alphabet), sometimes used in 161>88[3] (88 is code for Heil Hitler among neo-nazis, as H=8)
See also- List of highways numbered 161
- United Nations Security Council Resolution 161
- United States Supreme Court cases, Volume 161
External links{{Commons category|161 (number)}}- Number Facts and Trivia: 161
- The Number 161
- VirtueScience: 161
References 1. ^{{Cite web|url=https://oeis.org/A002412|title=Sloane's A002412 : Hexagonal pyramidal numbers|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-28}}
2. ^https://oeis.org/A002113
3. ^{{cite web|title=161>88|url=http://film.antifa.cz/?page_id=37|publisher=Antifascist Action|accessdate=2 January 2018|location=Czech Republic|format=Documentary|date=2012}}
{{Integers|1}}{{DEFAULTSORT:161 (Number)}} 1 : Integers |