Number

1,143

1,143 is a composite number, odd, a calendar year.

1,143 (one thousand one hundred forty-three) is an odd 4-digit number. It is a composite number with 6 divisors, and factors as 3² × 127. Written other ways, in Roman numerals it is MCXLIII and in binary, 10001110111.

Cube-Free Deficient Number Harshad / Niven Moran Number Odious Number Pernicious Number Recamán's Sequence Year

Interestingness

★ ★ ☆ ☆ ☆

4 notable facts · grade D

1,131 1,132 1,133 1,134 1,135 1,136 1,137 1,138 1,139 1,140 1,141 1,142 1,143 1,144 1,145 1,146 1,147 1,148 1,149 1,150 1,151 1,152 1,153 1,154 1,155

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Historical context — 1143 AD

Calendar year

Year 1143 (MCXLIII) was a common year starting on Friday 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: Friday
January 1, 1143
Ended on: Friday
December 31, 1143
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 1140s
1140–1149
Century: 12th century
1101–1200
Millennium: 2nd millennium
1001–2000
Years ago: 883
883 years before 2026.

In other calendars

Hebrew: 4903 / 4904 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 537 / 538 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Pig
Sexagenary cycle position 60 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1686 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 521 / 522 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1135 / 1136 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1065 / 1064 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 9
Digit product: 12
Digital root: 9
Palindrome: No
Bit width: 11 bits
Reversed: 3,411
Recamán's sequence: a(1,886) = 1,143
Square (n²): 1,306,449
Cube (n³): 1,493,271,207
Divisor count: 6
σ(n) — sum of divisors: 1,664
φ(n) — Euler's totient: 756
Sum of prime factors: 133

Primality

Prime factorization: 3 ² × 127

Nearest primes: 1,129 (−14) · 1,151 (+8)

Divisors & multiples

All divisors (6)

1 · 3 · 9 · 127 · 381 · 1143

Aliquot sum (sum of proper divisors): 521

Factor pairs (a × b = 1,143)

1 × 1143

3 × 381

9 × 127

First multiples

1,143 · 2,286 (double) · 3,429 · 4,572 · 5,715 · 6,858 · 8,001 · 9,144 · 10,287 · 11,430

Sums & aliquot sequence

As consecutive integers: 571 + 572 380 + 381 + 382 188 + 189 + 190 + 191 + 192 + 193 123 + 124 + … + 131

Aliquot sequence: 1,143 → 521 → 1 → 0 — terminates at zero

Continued fraction of √n

√1,143 = [33; (1, 4, 4, 1, 1, 1, 2, 3, 2, 1, 1, 1, 4, 4, 1, 66)]

Period length 16 — the block in parentheses repeats forever.

Representations

In words: one thousand one hundred forty-three
Ordinal: 1143rd
Roman numeral: MCXLIII
Binary: 10001110111
Octal: 2167
Hexadecimal: 0x477
Base64: BHc=
One's complement: 64,392 (16-bit)
Scientific notation: 1.143 × 10³
As a duration: 1,143 s = 19 minutes, 3 seconds

In other bases

ternary (3) 1120100

quaternary (4) 101313

quinary (5) 14033

senary (6) 5143

septenary (7) 3222

nonary (9) 1510

undecimal (11) 94a

duodecimal (12) 7b3

tridecimal (13) 69c

tetradecimal (14) 5b9

pentadecimal (15) 513

As an angle

1,143° = 3 × 360° + 63°

63° ≈ 1.1 rad

Compass bearing: ENE (east-northeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): ͵αρμγʹ
Mayan (base 20): 𝋢·𝋱·𝋣
Chinese: 一千一百四十三
Chinese (financial): 壹仟壹佰肆拾參

In other modern scripts

Eastern Arabic ١١٤٣ Devanagari ११४३ Bengali ১১৪৩ Tamil ௧௧௪௩ Thai ๑๑๔๓ Tibetan ༡༡༤༣ Khmer ១១៤៣ Lao ໑໑໔໓ Burmese ၁၁၄၃

Digit at this position in famous constants

π — Pi (π): Digit 1,143 = 8
e — Euler's number (e): Digit 1,143 = 3
φ — Golden ratio (φ): Digit 1,143 = 3
√2 — Pythagoras's (√2): Digit 1,143 = 1
ln 2 — Natural log of 2: Digit 1,143 = 4
γ — Euler-Mascheroni (γ): Digit 1,143 = 9

Also seen as

Unicode codepoint

Cyrillic Small Letter Izhitsa With Double Grave Accent

U+0477

Lowercase letter (Ll)

UTF-8 encoding: D1 B7 (2 bytes).

Lookup U+0477 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000477

RGB(0, 4, 119)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.119.

Address: 0.0.4.119
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.4.119

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 1,143 Hz is closest to:

Concert pitch (A4 = 440 Hz): D6 (1174.7 Hz, -47¢ — about midway to C♯6)
Scientific pitch (C4 = 256 Hz): D6 (1149.4 Hz, -10¢)
Baroque pitch (A4 = 415 Hz): D♯6 (1173.8 Hz, -46¢ — about midway to D6)

Position in π

The digit sequence 1143 first appears in π at position 18,450 of the decimal expansion (the 18,450ordinal-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.

Look up 1143 on Pi Search ↗