1,001
1,001 is a composite number, odd, a calendar year.
Historical context — 1001 AD
Calendar year
1001 (MI) was a common year starting on Wednesday of the Julian calendar, the 1001st year of the Common Era (CE) and Anno Domini (AD) designations, the 1st year of the 2nd millennium and the 11th century, and the 2nd year of the 1000s decade.
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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 1001
- Ended on
-
Thursday
December 31, 1001
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
1000s
1000–1009
- Century
-
11th century
1001–1100
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
1,025
1025 years before 2026.
In other calendars
- Hebrew
-
4761 / 4762 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
391 / 392 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Ox
Sexagenary cycle position 38 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1544 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
379 / 380 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
993 / 994 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
923 / 922 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 7 × 11 × 13
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one
- Ordinal
- 1001st
- Roman numeral
- MI
- Binary
- 1111101001
- Octal
- 1751
- Hexadecimal
- 0x3E9
- Base64
- A+k=
- One's complement
- 64,534 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓏺
- Greek (Milesian)
- ͵ααʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋡
- Chinese
- 一千零一
- Chinese (financial)
- 壹仟零壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,001 = 9
- e — Euler's number (e)
- Digit 1,001 = 4
- φ — Golden ratio (φ)
- Digit 1,001 = 2
- √2 — Pythagoras's (√2)
- Digit 1,001 = 2
- ln 2 — Natural log of 2
- Digit 1,001 = 7
- γ — Euler-Mascheroni (γ)
- Digit 1,001 = 2
Also seen as
UTF-8 encoding: CF A9 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.233.
- Address
- 0.0.3.233
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.233
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1001 first appears in π at position 15,761 of the decimal expansion (the 15,761ordinal-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.