Number

365

365 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Evil Number Happy Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 365 AD

Calendar year

Year 365 (CCCLXV) was a common year starting on Saturday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 365 BC

Calendar year

Year 365 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Friday
January 1, 365
Ended on: Friday
December 31, 365
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 360s
360–369
Century: 4th century
301–400
Millennium: 1st millennium
1–1000
Years ago: 1,661
1661 years before 2026.

In other calendars

Hebrew: 4125 / 4126 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Ox
Sexagenary cycle position 2 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 908 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 357 / 358 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 287 / 286 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 14
Digit product: 90
Digital root: 5
Palindrome: No
Bit width: 9 bits
Reversed: 563
Recamán's sequence: a(9,070) = 365
Square (n²): 133,225
Cube (n³): 48,627,125
Divisor count: 4
σ(n) — sum of divisors: 444
φ(n) — Euler's totient: 288
Sum of prime factors: 78

Primality

Prime factorization: 5 × 73

Nearest primes: 359 (−6) · 367 (+2)

Divisors & multiples

All divisors (4)

1 · 5 · 73 · 365

Aliquot sum (sum of proper divisors): 79

Factor pairs (a × b = 365)

1 × 365

5 × 73

First multiples

365 · 730 (double) · 1,095 · 1,460 · 1,825 · 2,190 · 2,555 · 2,920 · 3,285 · 3,650

Sums & aliquot sequence

As a sum of two squares: 2² + 19² = 13² + 14²

As consecutive integers: 182 + 183 71 + 72 + 73 + 74 + 75 32 + 33 + … + 41

Aliquot sequence: 365 → 79 → 1 → 0 — terminates at zero

Representations

In words: three hundred sixty-five
Ordinal: 365th
Roman numeral: CCCLXV
Binary: 101101101
Octal: 555
Hexadecimal: 0x16D
Base64: AW0=
One's complement: 65,170 (16-bit)

In other bases

ternary (3) 111112

quaternary (4) 11231

quinary (5) 2430

senary (6) 1405

septenary (7) 1031

nonary (9) 445

undecimal (11) 302

duodecimal (12) 265

tridecimal (13) 221

tetradecimal (14) 1c1

pentadecimal (15) 195

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): τξεʹ
Mayan (base 20): 𝋲·𝋥
Chinese: 三百六十五
Chinese (financial): 參佰陸拾伍

In other modern scripts

Eastern Arabic ٣٦٥ Devanagari ३६५ Bengali ৩৬৫ Tamil ௩௬௫ Thai ๓๖๕ Tibetan ༣༦༥ Khmer ៣៦៥ Lao ໓໖໕ Burmese ၃၆၅

Digit at this position in famous constants

π — Pi (π): Digit 365 = 3
e — Euler's number (e): Digit 365 = 3
φ — Golden ratio (φ): Digit 365 = 0
√2 — Pythagoras's (√2): Digit 365 = 5
ln 2 — Natural log of 2: Digit 365 = 5
γ — Euler-Mascheroni (γ): Digit 365 = 5

Also seen as

Unicode codepoint

Latin Small Letter U With Breve

U+016D

Lowercase letter (Ll)

UTF-8 encoding: C5 AD (2 bytes).

Lookup U+016D on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00016D

RGB(0, 1, 109)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.109.

Address: 0.0.1.109
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.109

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 365

The number 365 is an active NANP area code (North American Numbering Plan).

Primary area: Greater Toronto
Region: Ontario
Country: Canada

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 365 ↗