1,265
1,265 is a composite number, odd, a calendar year.
Notable events — 1265 AD
- Jan 20 Simon de Montfort convenes the first English Parliament including commoners.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 1265
- Ended on
-
Thursday
December 31, 1265
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
1260s
1260–1269
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
761
761 years before 2026.
In other calendars
- Hebrew
-
5025 / 5026 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
663 / 664 AH
Lunar calendar; year spans differ from Gregorian.
- 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
-
1808 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
643 / 644 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1257 / 1258 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1187 / 1186 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 5 × 11 × 23
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand two hundred sixty-five
- Ordinal
- 1265th
- Roman numeral
- MCCLXV
- Binary
- 10011110001
- Octal
- 2361
- Hexadecimal
- 0x4F1
- Base64
- BPE=
- One's complement
- 64,270 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ασξεʹ
- Mayan (base 20)
- 𝋣·𝋣·𝋥
- Chinese
- 一千二百六十五
- Chinese (financial)
- 壹仟貳佰陸拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,265 = 7
- e — Euler's number (e)
- Digit 1,265 = 3
- φ — Golden ratio (φ)
- Digit 1,265 = 5
- √2 — Pythagoras's (√2)
- Digit 1,265 = 3
- ln 2 — Natural log of 2
- Digit 1,265 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,265 = 4
Also seen as
UTF-8 encoding: D3 B1 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.241.
- Address
- 0.0.4.241
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.241
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1265 first appears in π at position 17,810 of the decimal expansion (the 17,810ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.