1,158
1,158 is a composite number, even, a calendar year.
Historical context — 1158 AD
Calendar year
Year 1158 (MCLVIII) was a common year starting on Wednesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
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
-
Wednesday
January 1, 1158
- Ended on
-
Wednesday
December 31, 1158
- 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
-
868
868 years before 2026.
In other calendars
- Hebrew
-
4918 / 4919 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
552 / 553 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Tiger
Sexagenary cycle position 15 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1701 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
536 / 537 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1150 / 1151 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1080 / 1079 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 15
- Digit product
- 40
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,511
- Recamán's sequence
- a(1,856) = 1,158
- Square (n²)
- 1,340,964
- Cube (n³)
- 1,552,836,312
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,328
- φ(n) — Euler's totient
- 384
- Sum of prime factors
- 198
Primality
Prime factorization: 2 × 3 × 193
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred fifty-eight
- Ordinal
- 1158th
- Roman numeral
- MCLVIII
- Binary
- 10010000110
- Octal
- 2206
- Hexadecimal
- 0x486
- Base64
- BIY=
- One's complement
- 64,377 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αρνηʹ
- Mayan (base 20)
- 𝋢·𝋱·𝋲
- Chinese
- 一千一百五十八
- Chinese (financial)
- 壹仟壹佰伍拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,158 = 3
- e — Euler's number (e)
- Digit 1,158 = 3
- φ — Golden ratio (φ)
- Digit 1,158 = 5
- √2 — Pythagoras's (√2)
- Digit 1,158 = 3
- ln 2 — Natural log of 2
- Digit 1,158 = 7
- γ — Euler-Mascheroni (γ)
- Digit 1,158 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1158, here are decompositions:
- 5 + 1153 = 1158
- 7 + 1151 = 1158
- 29 + 1129 = 1158
- 41 + 1117 = 1158
- 61 + 1097 = 1158
- 67 + 1091 = 1158
- 71 + 1087 = 1158
- 89 + 1069 = 1158
Showing the first eight; more decompositions exist.
UTF-8 encoding: D2 86 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.134.
- Address
- 0.0.4.134
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.134
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1158 first appears in π at position 36,288 of the decimal expansion (the 36,288ordinal-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.