1,148
1,148 is a composite number, even, a calendar year.
Historical context — 1148 AD
Calendar year
Year 1148 (MCXLVIII) was a leap year starting on Thursday 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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 1148
- Ended on
-
Friday
December 31, 1148
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1140s
1140–1149
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
878
878 years before 2026.
In other calendars
- Hebrew
-
4908 / 4909 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
542 / 543 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dragon
Sexagenary cycle position 5 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1691 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
526 / 527 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1140 / 1141 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1070 / 1069 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 14
- Digit product
- 32
- Digital root
- 5
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,411
- Recamán's sequence
- a(1,876) = 1,148
- Square (n²)
- 1,317,904
- Cube (n³)
- 1,512,953,792
- Divisor count
- 12
- σ(n) — sum of divisors
- 2,352
- φ(n) — Euler's totient
- 480
- Sum of prime factors
- 52
Primality
Prime factorization: 2 2 × 7 × 41
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred forty-eight
- Ordinal
- 1148th
- Roman numeral
- MCXLVIII
- Binary
- 10001111100
- Octal
- 2174
- Hexadecimal
- 0x47C
- Base64
- BHw=
- One's complement
- 64,387 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αρμηʹ
- Mayan (base 20)
- 𝋢·𝋱·𝋨
- Chinese
- 一千一百四十八
- Chinese (financial)
- 壹仟壹佰肆拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,148 = 0
- e — Euler's number (e)
- Digit 1,148 = 1
- φ — Golden ratio (φ)
- Digit 1,148 = 1
- √2 — Pythagoras's (√2)
- Digit 1,148 = 3
- ln 2 — Natural log of 2
- Digit 1,148 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,148 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1148, here are decompositions:
- 19 + 1129 = 1148
- 31 + 1117 = 1148
- 61 + 1087 = 1148
- 79 + 1069 = 1148
- 97 + 1051 = 1148
- 109 + 1039 = 1148
- 127 + 1021 = 1148
- 139 + 1009 = 1148
Showing the first eight; more decompositions exist.
UTF-8 encoding: D1 BC (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.124.
- Address
- 0.0.4.124
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.124
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 1148 first appears in π at position 15,707 of the decimal expansion (the 15,707ordinal-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.