1,372
1,372 is a composite number, even, a calendar year.
1,372 (one thousand three hundred seventy-two) is an even 4-digit number. It is a composite number with 12 divisors, and factors as 2² × 7³. Its proper divisors sum to 1,428, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is MCCCLXXII and in binary, 10101011100.
Interestingness
Historical context — 1372 AD
Calendar year
Year 1372 (MCCCLXXII) was a leap year starting on Thursday of the Julian calendar.
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Year facts
- Year type
-
Leap year
Divisible by 4 and not by 100; February has 29 days.
- Days in year
- 366
- ISO weeks
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Wednesday
January 1, 1372
- Ended on
-
Thursday
December 31, 1372
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1370s
1370–1379
- Century
-
14th century
1301–1400
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
654
654 years before 2026.
In other calendars
- Hebrew
-
5132 / 5133 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
773 / 774 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Rat
Sexagenary cycle position 49 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1915 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
750 / 751 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1364 / 1365 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1294 / 1293 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 2 × 7 3
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,372 = [37; (24, 1, 2, 7, 1, 8, 2, 1, 1, 1, 2, 2, 5, 1, 3, 18, 3, 1, 5, 2, 2, 1, 1, 1, …)]
Period length 32 — the block in parentheses repeats forever.
Representations
- In words
- one thousand three hundred seventy-two
- Ordinal
- 1372nd
- Roman numeral
- MCCCLXXII
- Binary
- 10101011100
- Octal
- 2534
- Hexadecimal
- 0x55C
- Base64
- BVw=
- One's complement
- 64,163 (16-bit)
- Scientific notation
- 1.372 × 10³
- As a duration
- 1,372 s = 22 minutes, 52 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ατοβʹ
- Mayan (base 20)
- 𝋣·𝋨·𝋬
- Chinese
- 一千三百七十二
- Chinese (financial)
- 壹仟參佰柒拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,372 = 7
- e — Euler's number (e)
- Digit 1,372 = 1
- φ — Golden ratio (φ)
- Digit 1,372 = 1
- √2 — Pythagoras's (√2)
- Digit 1,372 = 3
- ln 2 — Natural log of 2
- Digit 1,372 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,372 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1372, here are decompositions:
- 5 + 1367 = 1372
- 11 + 1361 = 1372
- 53 + 1319 = 1372
- 71 + 1301 = 1372
- 83 + 1289 = 1372
- 89 + 1283 = 1372
- 113 + 1259 = 1372
- 149 + 1223 = 1372
Showing the first eight; more decompositions exist.
UTF-8 encoding: D5 9C (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.92.
- Address
- 0.0.5.92
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.92
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,372 Hz is closest to:
- Concert pitch (A4 = 440 Hz): F6 (1396.9 Hz, -31¢)
- Scientific pitch (C4 = 256 Hz): F6 (1366.9 Hz, +6¢)
- Baroque pitch (A4 = 415 Hz): F♯6 (1395.9 Hz, -30¢)
The digit sequence 1372 first appears in π at position 16,973 of the decimal expansion (the 16,973ordinal-suffix:rd 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.