1,171
1,171 is a prime, odd, a calendar year.
Historical context — 1171 AD
Calendar year
Year 1171 (MCLXXI) 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, 1171
- Ended on
-
Friday
December 31, 1171
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1170s
1170–1179
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
855
855 years before 2026.
In other calendars
- Hebrew
-
4931 / 4932 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
566 / 567 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Rabbit
Sexagenary cycle position 28 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1714 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
549 / 550 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1163 / 1164 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1093 / 1092 Saka
Indian national calendar; year starts in March.
Properties
Primality
1,171 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred seventy-one
- Ordinal
- 1171st
- Roman numeral
- MCLXXI
- Binary
- 10010010011
- Octal
- 2223
- Hexadecimal
- 0x493
- Base64
- BJM=
- One's complement
- 64,364 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵αροαʹ
- Mayan (base 20)
- 𝋢·𝋲·𝋫
- Chinese
- 一千一百七十一
- Chinese (financial)
- 壹仟壹佰柒拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,171 = 5
- e — Euler's number (e)
- Digit 1,171 = 9
- φ — Golden ratio (φ)
- Digit 1,171 = 9
- √2 — Pythagoras's (√2)
- Digit 1,171 = 7
- ln 2 — Natural log of 2
- Digit 1,171 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,171 = 4
Also seen as
UTF-8 encoding: D2 93 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.147.
- Address
- 0.0.4.147
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.147
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1171 first appears in π at position 25,231 of the decimal expansion (the 25,231ordinal-suffix:st 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.