1,224
1,224 is a composite number, even, a calendar year.
Historical context — 1224 AD
Calendar year
Year 1224 (MCCXXIV) was a leap year starting on Monday 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
-
Monday
January 1, 1224
- Ended on
-
Tuesday
December 31, 1224
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1220s
1220–1229
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
802
802 years before 2026.
In other calendars
- Hebrew
-
4984 / 4985 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
620 / 621 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
-
1767 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
602 / 603 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1216 / 1217 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1146 / 1145 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 9
- Digit product
- 16
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 4,221
- Recamán's sequence
- a(8,540) = 1,224
- Square (n²)
- 1,498,176
- Cube (n³)
- 1,833,767,424
- Divisor count
- 24
- σ(n) — sum of divisors
- 3,510
- φ(n) — Euler's totient
- 384
- Sum of prime factors
- 29
Primality
Prime factorization: 2 3 × 3 2 × 17
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand two hundred twenty-four
- Ordinal
- 1224th
- Roman numeral
- MCCXXIV
- Binary
- 10011001000
- Octal
- 2310
- Hexadecimal
- 0x4C8
- Base64
- BMg=
- One's complement
- 64,311 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ασκδʹ
- Mayan (base 20)
- 𝋣·𝋡·𝋤
- Chinese
- 一千二百二十四
- Chinese (financial)
- 壹仟貳佰貳拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,224 = 1
- e — Euler's number (e)
- Digit 1,224 = 6
- φ — Golden ratio (φ)
- Digit 1,224 = 7
- √2 — Pythagoras's (√2)
- Digit 1,224 = 7
- ln 2 — Natural log of 2
- Digit 1,224 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,224 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1224, here are decompositions:
- 7 + 1217 = 1224
- 11 + 1213 = 1224
- 23 + 1201 = 1224
- 31 + 1193 = 1224
- 37 + 1187 = 1224
- 43 + 1181 = 1224
- 53 + 1171 = 1224
- 61 + 1163 = 1224
Showing the first eight; more decompositions exist.
UTF-8 encoding: D3 88 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.200.
- Address
- 0.0.4.200
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.200
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1224 first appears in π at position 660 of the decimal expansion (the 660ordinal-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.