365 (number)

365 is a semiprime centered square number. It is also the fifth 38-gonal number.

For multiplication, it is calculated as $5\; \backslash times\; 73$. Both 5 and 73 are prime numbers.

It is the smallest number that has more than one expression as a sum of consecutive square numbers:

:$365\; =\; 13^2\; +\; 14^2$

:$365\; =\; 10^2\; +\; 11^2\; +\; 12^2$

There are no known primes with period 365, while at least one prime with each of the periods 1 to 364 is known.

There are 365.2422 solar days in the mean tropical year. Several solar calendars have a year containing 365 days.Bryan Bunch, The Kingdom of Infinite Number. New York: W. H. Freeman & Company (2000): 169 Related to this, in Ontario, the driver's license learner's permit used to be called "365"{{cite web |url=http://emily.icomm.ca/isms.html |title=An American's Guide to Canada: Canadianisms |website=emily.icomm.ca |access-date=22 May 2022 |archive-url=https://web.archive.org/web/19990821215125/http://emily.icomm.ca/isms.html |archive-date=21 August 1999 |url-status=dead}}{{Cite web |url=http://www.ontla.on.ca/hansard/committee_debates/35_parl/session3/resdev/r013.htm |title=Legislative Assembly of Ontario. Hansard |date=7 September 1993 |access-date=2006-03-31 |archive-url=https://web.archive.org/web/20051207114937/http://www.ontla.on.ca/hansard/committee_debates/35_parl/session3/resdev/r013.htm |archive-date=2005-12-07 |url-status=dead }} because it was valid for only 366 days. Financial and scientific calculations often use a 365-day calendar to simplify daily rates.

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Category:Integers