1,180
1,180 is a composite number, even, a calendar year.
Historical context — 1180 AD
Calendar year
Year 1180 (MCLXXX) 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, 1180
- Ended on
-
Wednesday
December 31, 1180
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1180s
1180–1189
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
846
846 years before 2026.
In other calendars
- Hebrew
-
4940 / 4941 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
575 / 576 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Rat
Sexagenary cycle position 37 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1723 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
558 / 559 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1172 / 1173 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1102 / 1101 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 10
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 811
- Flips to (rotate 180°)
- 811
- Recamán's sequence
- a(1,812) = 1,180
- Square (n²)
- 1,392,400
- Cube (n³)
- 1,643,032,000
- Divisor count
- 12
- σ(n) — sum of divisors
- 2,520
- φ(n) — Euler's totient
- 464
- Sum of prime factors
- 68
Primality
Prime factorization: 2 2 × 5 × 59
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred eighty
- Ordinal
- 1180th
- Roman numeral
- MCLXXX
- Binary
- 10010011100
- Octal
- 2234
- Hexadecimal
- 0x49C
- Base64
- BJw=
- One's complement
- 64,355 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵αρπʹ
- Mayan (base 20)
- 𝋢·𝋳·𝋠
- Chinese
- 一千一百八十
- Chinese (financial)
- 壹仟壹佰捌拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,180 = 7
- e — Euler's number (e)
- Digit 1,180 = 7
- φ — Golden ratio (φ)
- Digit 1,180 = 4
- √2 — Pythagoras's (√2)
- Digit 1,180 = 8
- ln 2 — Natural log of 2
- Digit 1,180 = 3
- γ — Euler-Mascheroni (γ)
- Digit 1,180 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1180, here are decompositions:
- 17 + 1163 = 1180
- 29 + 1151 = 1180
- 71 + 1109 = 1180
- 83 + 1097 = 1180
- 89 + 1091 = 1180
- 131 + 1049 = 1180
- 149 + 1031 = 1180
- 167 + 1013 = 1180
Showing the first eight; more decompositions exist.
UTF-8 encoding: D2 9C (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.156.
- Address
- 0.0.4.156
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.156
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 1180 first appears in π at position 27,337 of the decimal expansion (the 27,337ordinal-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.