365 (number)

365 (three hundred [and] sixty-five) is the natural number following 364 and preceding 366.

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

For multiplication, it is calculated as ${\displaystyle 5\times 73}$. 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:

${\displaystyle 365=13^{2}+14^{2}}$

${\displaystyle 365=10^{2}+11^{2}+12^{2}}$

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.^[1] Related to this, in Ontario, the driver's license learner's permit used to be called "365"^[2][3] because it was valid for only 366 days. Financial and scientific calculations often use a 365-day calendar to simplify daily rates.

In the Jewish faith there are 365 "negative commandments".^[4] Also, the Bible states that Enoch lived for 365 years before entering heaven alive (see Genesis 5:23–24).

The letters of the deity Abraxas, in the Greek notation, make up the number 365. This number was subsequently viewed as signifying the levels of heaven.^[5]