1,284
1,284 is a composite number, even, a calendar year.
Historical context — 1284 AD
Calendar year
Year 1284 (MCCLXXXIV) was a leap year starting on Saturday 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
- 52
- Started on
-
Saturday
January 1, 1284
- Ended on
-
Sunday
December 31, 1284
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1280s
1280–1289
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
742
742 years before 2026.
In other calendars
- Hebrew
-
5044 / 5045 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
682 / 683 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Monkey
Sexagenary cycle position 21 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1827 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
662 / 663 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1276 / 1277 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1206 / 1205 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 15
- Digit product
- 64
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 4,821
- Recamán's sequence
- a(30,480) = 1,284
- Square (n²)
- 1,648,656
- Cube (n³)
- 2,116,874,304
- Divisor count
- 12
- σ(n) — sum of divisors
- 3,024
- φ(n) — Euler's totient
- 424
- Sum of prime factors
- 114
Primality
Prime factorization: 2 2 × 3 × 107
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand two hundred eighty-four
- Ordinal
- 1284th
- Roman numeral
- MCCLXXXIV
- Binary
- 10100000100
- Octal
- 2404
- Hexadecimal
- 0x504
- Base64
- BQQ=
- One's complement
- 64,251 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ασπδʹ
- Mayan (base 20)
- 𝋣·𝋤·𝋤
- Chinese
- 一千二百八十四
- Chinese (financial)
- 壹仟貳佰捌拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,284 = 0
- e — Euler's number (e)
- Digit 1,284 = 3
- φ — Golden ratio (φ)
- Digit 1,284 = 3
- √2 — Pythagoras's (√2)
- Digit 1,284 = 4
- ln 2 — Natural log of 2
- Digit 1,284 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,284 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1284, here are decompositions:
- 5 + 1279 = 1284
- 7 + 1277 = 1284
- 47 + 1237 = 1284
- 53 + 1231 = 1284
- 61 + 1223 = 1284
- 67 + 1217 = 1284
- 71 + 1213 = 1284
- 83 + 1201 = 1284
Showing the first eight; more decompositions exist.
UTF-8 encoding: D4 84 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.4.
- Address
- 0.0.5.4
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.4
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1284 first appears in π at position 148 of the decimal expansion (the 148ordinal-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.