1,315
1,315 is a composite number, odd, a calendar year.
1,315 (one thousand three hundred fifteen) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 5 × 263. Written other ways, in Roman numerals it is MCCCXV and in binary, 10100100011.
Interestingness
Historical context — 1315 AD
Calendar year
Year 1315 (MCCCXV) was a common year starting on Wednesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 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
-
Tuesday
January 1, 1315
- Ended on
-
Tuesday
December 31, 1315
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1310s
1310–1319
- Century
-
14th century
1301–1400
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
711
711 years before 2026.
In other calendars
- Hebrew
-
5075 / 5076 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
714 / 715 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Rabbit
Sexagenary cycle position 52 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1858 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
693 / 694 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1307 / 1308 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1237 / 1236 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 5 × 263
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,315 = [36; (3, 1, 4, 11, 1, 7, 7, 7, 1, 11, 4, 1, 3, 72)]
Period length 14 — the block in parentheses repeats forever.
Representations
- In words
- one thousand three hundred fifteen
- Ordinal
- 1315th
- Roman numeral
- MCCCXV
- Binary
- 10100100011
- Octal
- 2443
- Hexadecimal
- 0x523
- Base64
- BSM=
- One's complement
- 64,220 (16-bit)
- Scientific notation
- 1.315 × 10³
- As a duration
- 1,315 s = 21 minutes, 55 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ατιεʹ
- Mayan (base 20)
- 𝋣·𝋥·𝋯
- Chinese
- 一千三百一十五
- Chinese (financial)
- 壹仟參佰壹拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,315 = 9
- e — Euler's number (e)
- Digit 1,315 = 8
- φ — Golden ratio (φ)
- Digit 1,315 = 4
- √2 — Pythagoras's (√2)
- Digit 1,315 = 4
- ln 2 — Natural log of 2
- Digit 1,315 = 7
- γ — Euler-Mascheroni (γ)
- Digit 1,315 = 1
Also seen as
UTF-8 encoding: D4 A3 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.35.
- Address
- 0.0.5.35
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.35
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,315 Hz is closest to:
- Concert pitch (A4 = 440 Hz): E6 (1318.5 Hz, -5¢)
- Scientific pitch (C4 = 256 Hz): E6 (1290.2 Hz, +33¢)
- Baroque pitch (A4 = 415 Hz): F6 (1317.5 Hz, -3¢)
The digit sequence 1315 first appears in π at position 1,096 of the decimal expansion (the 1,096ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.