Tridecagon

145 is the natural number following 144 and preceding 146.

In mathematics

• Although composite, 145 is a pseudoprime.
• Given 145, the Mertens function returns 0.
• 145 is a pentagonal number and a centered square number.
• $145=12^{2}+1^{2}=8^{2}+9^{2}$. 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.
• $145=1!+4!+5!$, 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

In sports

• The Grand Union Canal Race is a 145-mile ultramarathon from Birmingham to London along the Grand Union Canal
• Football Hall of Famer Marcus Allen had 145 touchdowns in his NFL career
• Ted Williams hit 31 home runs, and had 145 RBI as a rookie in 1939
• During the NHL 2005–2006 season
  • About 12% of all games (145 of 1,230) were decided by a shootout
  • Teams scored 7,443 goals – not including 145 goals awarded to clubs winning a shootout

In transportation

• 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
• Alabama State Route 145 runs from Clanton to Wilsonville
• California State Route 145 runs from Interstate 5 to Fresno
• Connecticut Route 145 runs from Clinton to Chester
• Illinois Route 145 runs from Metropolis to Harrisburg
• Maryland Route 145 runs from Cockeysville to Baldwin
• Massachusetts Route 145 in Suffolk County
• Missouri Route 145 in Mercer County
• New York State Route 145 runs from Cairo to Sharon
• Pennsylvania Route 145 in Lehigh Valley
• Virginia State Route 145 runs from Chesterfield to Richmond
• Winnipeg Route 145 runs from the Perimeter Highway to Route 80/Waverley Street

In TV and radio

• The TV series Spin City ran on ABC from 1996 to 2002 with 145 episodes
• Channel 145 on the Dish Network is ESPN Alternate
• Channel 145 on XM Satellite Radio is IndyCar
• Channel 145 on Sirius Satellite Radio is Fox News Talk

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
• Botswana ranks #145 in world population
• 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

See also

• List of highways numbered 145
• United Nations Security Council Resolution 145
• United States Supreme Court cases, Volume 145

References

• Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 140

External links

• The Natural Number 145
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