1,154
1,154 is a composite number, even, a calendar year.
Historical context — 1154 AD
Calendar year
Year 1154 (MCLIV) was a common year starting on Friday 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
- 52
- Started on
-
Friday
January 1, 1154
- Ended on
-
Friday
December 31, 1154
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1150s
1150–1159
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
872
872 years before 2026.
In other calendars
- Hebrew
-
4914 / 4915 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
548 / 549 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Dog
Sexagenary cycle position 11 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1697 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
532 / 533 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1146 / 1147 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1076 / 1075 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 577
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred fifty-four
- Ordinal
- 1154th
- Roman numeral
- MCLIV
- Binary
- 10010000010
- Octal
- 2202
- Hexadecimal
- 0x482
- Base64
- BII=
- One's complement
- 64,381 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αρνδʹ
- Mayan (base 20)
- 𝋢·𝋱·𝋮
- Chinese
- 一千一百五十四
- Chinese (financial)
- 壹仟壹佰伍拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,154 = 7
- e — Euler's number (e)
- Digit 1,154 = 2
- φ — Golden ratio (φ)
- Digit 1,154 = 6
- √2 — Pythagoras's (√2)
- Digit 1,154 = 1
- ln 2 — Natural log of 2
- Digit 1,154 = 1
- γ — Euler-Mascheroni (γ)
- Digit 1,154 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1154, here are decompositions:
- 3 + 1151 = 1154
- 31 + 1123 = 1154
- 37 + 1117 = 1154
- 61 + 1093 = 1154
- 67 + 1087 = 1154
- 103 + 1051 = 1154
- 157 + 997 = 1154
- 163 + 991 = 1154
Showing the first eight; more decompositions exist.
UTF-8 encoding: D2 82 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.130.
- Address
- 0.0.4.130
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.130
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1154 first appears in π at position 16,879 of the decimal expansion (the 16,879ordinal-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.