1,441
1,441 is a composite number, odd, a calendar year.
1,441 (one thousand four hundred forty-one) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 11 × 131. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in Roman numerals it is MCDXLI and in binary, 10110100001.
Interestingness
Historical context — 1441 AD
Calendar year
1441 (MCDXLI) was a common year starting on Sunday of the Julian calendar, the 1441st year of the Common Era (CE) and Anno Domini (AD) designations, the 441st year of the 2nd millennium, the 41st year of the 15th century, and the 2nd year of the 1440s decade.
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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, 1441
- Ended on
-
Friday
December 31, 1441
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1440s
1440–1449
- Century
-
15th century
1401–1500
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
585
585 years before 2026.
In other calendars
- Hebrew
-
5201 / 5202 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
844 / 845 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Rooster
Sexagenary cycle position 58 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1984 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
819 / 820 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1433 / 1434 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1363 / 1362 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 11 × 131
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,441 = [37; (1, 24, 3, 8, 9, 2, 1, 2, 2, 1, 3, 1, 3, 4, 1, 3, 1, 14, 2, 1, 1, 4, 2, 6, …)]
Period length 48 — the block in parentheses repeats forever.
Representations
- In words
- one thousand four hundred forty-one
- Ordinal
- 1441st
- Roman numeral
- MCDXLI
- Binary
- 10110100001
- Octal
- 2641
- Hexadecimal
- 0x5A1
- Base64
- BaE=
- One's complement
- 64,094 (16-bit)
- Scientific notation
- 1.441 × 10³
- As a duration
- 1,441 s = 24 minutes, 1 second
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵αυμαʹ
- Mayan (base 20)
- 𝋣·𝋬·𝋡
- Chinese
- 一千四百四十一
- Chinese (financial)
- 壹仟肆佰肆拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,441 = 0
- e — Euler's number (e)
- Digit 1,441 = 8
- φ — Golden ratio (φ)
- Digit 1,441 = 2
- √2 — Pythagoras's (√2)
- Digit 1,441 = 4
- ln 2 — Natural log of 2
- Digit 1,441 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,441 = 8
Also seen as
UTF-8 encoding: D6 A1 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.161.
- Address
- 0.0.5.161
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.161
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,441 Hz is closest to:
- Concert pitch (A4 = 440 Hz): F♯6 (1480 Hz, -46¢ — about midway to F6)
- Scientific pitch (C4 = 256 Hz): F♯6 (1448.2 Hz, -9¢)
- Baroque pitch (A4 = 415 Hz): G6 (1478.9 Hz, -45¢ — about midway to F♯6)
The digit sequence 1441 first appears in π at position 1,638 of the decimal expansion (the 1,638ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.