1,264
1,264 is a composite number, even, a calendar year.
1,264 (one thousand two hundred sixty-four) is an even 4-digit number. It is a composite number with 10 divisors, and factors as 2⁴ × 79. Written other ways, in Roman numerals it is MCCLXIV and in binary, 10011110000.
Interestingness
Historical context — 1264 AD
Calendar year
Year 1264 (MCCLXIV) was a leap year starting on Tuesday of the Julian calendar.
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Year facts
- Year type
-
Leap year
Divisible by 4 and not by 100; February has 29 days.
- Days in year
- 366
- ISO weeks
- 52
- Started on
-
Tuesday
January 1, 1264
- Ended on
-
Wednesday
December 31, 1264
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1260s
1260–1269
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
762
762 years before 2026.
In other calendars
- Hebrew
-
5024 / 5025 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
662 / 663 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Rat
Sexagenary cycle position 1 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1807 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
642 / 643 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1256 / 1257 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1186 / 1185 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 4 × 79
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,264 = [35; (1, 1, 4, 4, 4, 1, 1, 70)]
Period length 8 — the block in parentheses repeats forever.
Representations
- In words
- one thousand two hundred sixty-four
- Ordinal
- 1264th
- Roman numeral
- MCCLXIV
- Binary
- 10011110000
- Octal
- 2360
- Hexadecimal
- 0x4F0
- Base64
- BPA=
- One's complement
- 64,271 (16-bit)
- Scientific notation
- 1.264 × 10³
- As a duration
- 1,264 s = 21 minutes, 4 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ασξδʹ
- Mayan (base 20)
- 𝋣·𝋣·𝋤
- Chinese
- 一千二百六十四
- Chinese (financial)
- 壹仟貳佰陸拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,264 = 4
- e — Euler's number (e)
- Digit 1,264 = 2
- φ — Golden ratio (φ)
- Digit 1,264 = 9
- √2 — Pythagoras's (√2)
- Digit 1,264 = 8
- ln 2 — Natural log of 2
- Digit 1,264 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,264 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1264, here are decompositions:
- 5 + 1259 = 1264
- 41 + 1223 = 1264
- 47 + 1217 = 1264
- 71 + 1193 = 1264
- 83 + 1181 = 1264
- 101 + 1163 = 1264
- 113 + 1151 = 1264
- 167 + 1097 = 1264
Showing the first eight; more decompositions exist.
UTF-8 encoding: D3 B0 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.240.
- Address
- 0.0.4.240
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.240
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,264 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D♯6 (1244.5 Hz, +27¢)
- Scientific pitch (C4 = 256 Hz): E6 (1290.2 Hz, -35¢)
- Baroque pitch (A4 = 415 Hz): E6 (1243.6 Hz, +28¢)
The digit sequence 1264 first appears in π at position 9,900 of the decimal expansion (the 9,900ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.