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|Cardinal||one hundred forty-five|
(one hundred forty-fifth)
|Factorization||5 × 29|
|Divisors||1, 5, 29, 145|
- Although composite, 145 is a pseudoprime.
- Given 145, the Mertens function returns 0.
- 145 is a pentagonal number and a centered square number.
- . 145 is the fourth number that is the sum of two different pairs of squares. Also, 145 is the result of 34 + 43, making it a Leyland number.
- , making it a factorion. The only other numbers that have the property that they are the sum of the factorials of their digits are 1, 2 and 40585.
In the military
- USS Armada (AM-145) was a United States Navy Admirable minesweeper ship during World War II
- USS Colbert (APA-145) was a United States Navy Haskell class attack transport during World War II
- USS General Harry Taylor (AP-145) was a United States Navy General G. O. Squier transport ship during World War II
- USS Greer (DD-145) was a United States Navy Wickes class destroyer during World War II
- USS Huse (DE-145) was a United States Navy Edsall class destroyer during World War II
- USS Roanoke (CL-145) was a United States Navy cruiser following World War II
- The Grand Union Canal Race is a 145-mile ultramarathon from Birmingham to London along the Grand Union Canal
- Eurocopter EC 145 is a twin-engine light utility helicopter
- The Delahaye 145 Sports Car from 1938
- The Alfa Romeo 145 car produced between 1994 and 2001
- Volvo 145 Express station wagon
- ERJ 145 regional jets produced by Embraer
- Golden Gate Transit Bus Route 145
- London Bus Route 145
In other fields
145 is also:
- The year AD 145 or 145 BC
- 145 AH is a year in the Islamic calendar that corresponds to 762 – 763 CE
- 145 Adeona is a large Main belt asteroid
- Psalm 145
- Sonnet 145
- Apple Computer laptops, such as the PowerBook 145 and PowerBook 145B
- Puff Daddy song “Picture it” includes the lyrics “in something foreign soarin’ 145”
- 145th Street blues band
- Tsuu T'ina Nation 145 Indian reserve in Alberta, Canada
- The 2004 film “Love and 145 Watts” starring Jessica Baxter
- 145 mg medicine tablets, as with Tricor
- "One Four Five" is a song by The Cat Empire
- List of highways numbered 145
- United Nations Security Council Resolution 145
- United States Supreme Court cases, Volume 145
- Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 140
- "Sloane's A028442 : Numbers n such that Mertens' function is zero". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- "Sloane's A000326 : Pentagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- "Sloane's A001844 : Centered square numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- "Sloane's A014080 : Factorions". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
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