1,421
1,421 is a composite number, odd, a calendar year.
Historical context — 1421 AD
Calendar year
Year 1421 (MCDXXI) 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
-
Monday
January 1, 1421
- Ended on
-
Monday
December 31, 1421
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1420s
1420–1429
- Century
-
15th century
1401–1500
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
605
605 years before 2026.
In other calendars
- Hebrew
-
5181 / 5182 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
823 / 824 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
-
1964 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
799 / 800 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1413 / 1414 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1343 / 1342 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 7 2 × 29
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand four hundred twenty-one
- Ordinal
- 1421st
- Roman numeral
- MCDXXI
- Binary
- 10110001101
- Octal
- 2615
- Hexadecimal
- 0x58D
- Base64
- BY0=
- One's complement
- 64,114 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵αυκαʹ
- Mayan (base 20)
- 𝋣·𝋫·𝋡
- Chinese
- 一千四百二十一
- Chinese (financial)
- 壹仟肆佰貳拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,421 = 7
- e — Euler's number (e)
- Digit 1,421 = 6
- φ — Golden ratio (φ)
- Digit 1,421 = 0
- √2 — Pythagoras's (√2)
- Digit 1,421 = 2
- ln 2 — Natural log of 2
- Digit 1,421 = 4
- γ — Euler-Mascheroni (γ)
- Digit 1,421 = 9
Also seen as
UTF-8 encoding: D6 8D (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.141.
- Address
- 0.0.5.141
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.141
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1421 first appears in π at position 3,096 of the decimal expansion (the 3,096ordinal-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.