365 (number)
Encyclopedia
365 is the natural number
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...

 following 364 and preceding 366.

Mathematics

365 is a semiprime
Semiprime
In mathematics, a semiprime is a natural number that is the product of two prime numbers. The first few semiprimes are 4, 6, 9, 10, 14, 15, 21, 22, 25, 26, ... ....

 centered square number
Centered square number
In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all other dots surrounding the center dot in successive square layers. That is, each centered square number equals the number of dots within a...

. It is also the fifth 38
38 (number)
This article discusses the number thirty-eight. For the year 38 CE, see 38. For other uses of 38, see 38 38 is the natural number following 37 and preceding 39.-In mathematics:...

-gonal number.

It is the smallest number which has more than one expression as a sum of consecutive square number
Square number
In mathematics, a square number, sometimes also called a perfect square, is an integer that is the square of an integer; in other words, it is the product of some integer with itself...

s:

Timekeeping

There are 365.2422 solar days in the mean tropical year. Several solar calendar
Solar calendar
A solar calendar is a calendar whose dates indicate the position of the earth on its revolution around the sun .-Tropical solar calendars:...

s have a year containing 365 days. Related to this, in Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, the driver's license
Driver's license
A driver's license/licence , or driving licence is an official document which states that a person may operate a motorized vehicle, such as a motorcycle, car, truck or a bus, on a public roadway. Most U.S...

 learner's permit used to be called "365" because it was valid for only 365 days. Financial and scientific calculations often use a 365-day calendar
365-day calendar
A 365-day calendar consists of exactly 365 days per year , and is primarily used in computer models and as an assumption in every-day calculations...

 to simplify daily rates.

Gnosticism

The letters of the deity Abraxas
Abraxas
The word Abrasax was a word of mystic meaning in the system of the Gnostic Basilides, being there applied to the “Great Archon” , the princeps of the 365 spheres...

, in the Greek
Greek language
Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

 notation, make up the number 365. This number was subsequently viewed as signifying the levels of heaven
Heaven
Heaven, the Heavens or Seven Heavens, is a common religious cosmological or metaphysical term for the physical or transcendent place from which heavenly beings originate, are enthroned or inhabit...

.
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