1,409
1,409 is a prime, odd, a calendar year.
Historical context — 1409 AD
Calendar year
Year 1409 (MCDIX) was a common year starting on Tuesday 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
-
Sunday
January 1, 1409
- Ended on
-
Sunday
December 31, 1409
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1400s
1400–1409
- Century
-
15th century
1401–1500
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
617
617 years before 2026.
In other calendars
- Hebrew
-
5169 / 5170 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
811 / 812 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Ox
Sexagenary cycle position 26 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1952 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
787 / 788 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1401 / 1402 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1331 / 1330 Saka
Indian national calendar; year starts in March.
Properties
Primality
1,409 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand four hundred nine
- Ordinal
- 1409th
- Roman numeral
- MCDIX
- Binary
- 10110000001
- Octal
- 2601
- Hexadecimal
- 0x581
- Base64
- BYE=
- One's complement
- 64,126 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αυθʹ
- Mayan (base 20)
- 𝋣·𝋪·𝋩
- Chinese
- 一千四百零九
- Chinese (financial)
- 壹仟肆佰零玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,409 = 7
- e — Euler's number (e)
- Digit 1,409 = 6
- φ — Golden ratio (φ)
- Digit 1,409 = 4
- √2 — Pythagoras's (√2)
- Digit 1,409 = 9
- ln 2 — Natural log of 2
- Digit 1,409 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,409 = 1
Also seen as
UTF-8 encoding: D6 81 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.129.
- Address
- 0.0.5.129
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.129
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1409 first appears in π at position 9,319 of the decimal expansion (the 9,319ordinal-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.