1,142
1,142 is a composite number, even, a calendar year.
Historical context — 1142 AD
Calendar year
Year 1142 (MCXLII) was a common year starting on Thursday of the Julian calendar.
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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, 1142
- Ended on
-
Thursday
December 31, 1142
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
1140s
1140–1149
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
884
884 years before 2026.
In other calendars
- Hebrew
-
4902 / 4903 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
536 / 537 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Dog
Sexagenary cycle position 59 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1685 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
520 / 521 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1134 / 1135 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1064 / 1063 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 571
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred forty-two
- Ordinal
- 1142nd
- Roman numeral
- MCXLII
- Binary
- 10001110110
- Octal
- 2166
- Hexadecimal
- 0x476
- Base64
- BHY=
- One's complement
- 64,393 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵αρμβʹ
- Mayan (base 20)
- 𝋢·𝋱·𝋢
- Chinese
- 一千一百四十二
- Chinese (financial)
- 壹仟壹佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,142 = 8
- e — Euler's number (e)
- Digit 1,142 = 1
- φ — Golden ratio (φ)
- Digit 1,142 = 9
- √2 — Pythagoras's (√2)
- Digit 1,142 = 5
- ln 2 — Natural log of 2
- Digit 1,142 = 9
- γ — Euler-Mascheroni (γ)
- Digit 1,142 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1142, here are decompositions:
- 13 + 1129 = 1142
- 19 + 1123 = 1142
- 73 + 1069 = 1142
- 79 + 1063 = 1142
- 103 + 1039 = 1142
- 109 + 1033 = 1142
- 151 + 991 = 1142
- 223 + 919 = 1142
Showing the first eight; more decompositions exist.
UTF-8 encoding: D1 B6 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.118.
- Address
- 0.0.4.118
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.118
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1142 first appears in π at position 27,685 of the decimal expansion (the 27,685ordinal-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.