141 is:

• a centered pentagonal number.^[1]
• the sum of the sums of the divisors of the first 13 positive integers.^[2]
• the second n to give a prime Cullen number (of the form n2ⁿ + 1).^[3]
• an undulating number in base 10, with the previous being 131, and the next being 151.
• the sixth hendecagonal (11-gonal) number.^[4]
• a semiprime: a product of two prime numbers, namely 3 and 47. Since those prime factors are Gaussian primes, this means that 141 is a Blum integer.
• a Hilbert prime

• The Lockheed C-141 Starlifter was a United States Air Force military strategic airlifter
• K-141 Kursk was a Russian nuclear cruise missile submarine, which sank in the Barents Sea on 12 August 2000
• USS Alchemy (AM-141) was a United States Navy Admirable-class minesweeper ship during World War II
• USS Buckingham (APA-141) was a United States Navy Haskell-class attack transport during World War II
• USS General A. W. Greely (AP-141) was a United States Navy General G. O. Squier-class transport during World War II
• USS Hamilton (DD-141) was a United States Navy Wickes-class destroyer following World War I
• USS Hill (DE-141) was a United States Navy Edsall-class destroyer escort during World War II

• London Buses route 141 is a Transport for London contracted bus route in London
• 141 Nottingham–Sutton-in-Ashfield is a bus route in England
• The 141 C Ouest was a 2-8-2 steam locomotive of the Chemin de fer de l'État
• British Rail Class 141 was the first production model of the Pacer diesel multiple units
• Union des Transports Africains de Guinée Flight 141, which crashed in the Bight of Benin on December 25, 2003
• The Saipa 141 car produced by SAIPA
• The Córas Iompair Éireann 141 class locomotive from General Motors Electro-Motive Division in 1962

141 is also:

• The year AD 141 or 141 BC
• 141 AH is a year in the Islamic calendar that corresponds to 759 – 760 CE
• 141 Lumen is a dark C-type, rocky asteroid orbiting in the asteroid belt
• The atomic number of unquadunium, a temporary chemical element
• The telephone dialing prefix for withholding one's Caller ID in the United Kingdom
• Psalm 141
• Sonnet 141 by William Shakespeare

• List of highways numbered 141
• United Nations Security Council Resolution 141
• United States Supreme Court cases, Volume 141