Number

1,165

1,165 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Odious Number Pernicious Number Recamán's Sequence Semiprime Smith Number Squarefree Year

Historical context — 1165 AD

Calendar year

Year 1165 (MCLXV) was a common year starting on Friday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback 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, 1165
Ended on: Friday
December 31, 1165
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 1160s
1160–1169
Century: 12th century
1101–1200
Millennium: 2nd millennium
1001–2000
Years ago: 861
861 years before 2026.

In other calendars

Hebrew: 4925 / 4926 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 560 / 561 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Rooster
Sexagenary cycle position 22 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1708 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 543 / 544 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1157 / 1158 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1087 / 1086 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 13
Digit product: 30
Digital root: 4
Palindrome: No
Bit width: 11 bits
Reversed: 5,611
Recamán's sequence: a(1,842) = 1,165
Square (n²): 1,357,225
Cube (n³): 1,581,167,125
Divisor count: 4
σ(n) — sum of divisors: 1,404
φ(n) — Euler's totient: 928
Sum of prime factors: 238

Primality

Prime factorization: 5 × 233

Nearest primes: 1,163 (−2) · 1,171 (+6)

Divisors & multiples

All divisors (4)

1 · 5 · 233 · 1165

Aliquot sum (sum of proper divisors): 239

Factor pairs (a × b = 1,165)

1 × 1165

5 × 233

First multiples

1,165 · 2,330 (double) · 3,495 · 4,660 · 5,825 · 6,990 · 8,155 · 9,320 · 10,485 · 11,650

Sums & aliquot sequence

As a sum of two squares: 3² + 34² = 18² + 29²

As consecutive integers: 582 + 583 231 + 232 + 233 + 234 + 235 112 + 113 + … + 121

Aliquot sequence: 1,165 → 239 → 1 → 0 — terminates at zero

Representations

In words: one thousand one hundred sixty-five
Ordinal: 1165th
Roman numeral: MCLXV
Binary: 10010001101
Octal: 2215
Hexadecimal: 0x48D
Base64: BI0=
One's complement: 64,370 (16-bit)

In other bases

ternary (3) 1121011

quaternary (4) 102031

quinary (5) 14130

senary (6) 5221

septenary (7) 3253

nonary (9) 1534

undecimal (11) 96a

duodecimal (12) 811

tridecimal (13) 6b8

tetradecimal (14) 5d3

pentadecimal (15) 52a

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵αρξεʹ
Mayan (base 20): 𝋢·𝋲·𝋥
Chinese: 一千一百六十五
Chinese (financial): 壹仟壹佰陸拾伍

In other modern scripts

Eastern Arabic ١١٦٥ Devanagari ११६५ Bengali ১১৬৫ Tamil ௧௧௬௫ Thai ๑๑๖๕ Tibetan ༡༡༦༥ Khmer ១១៦៥ Lao ໑໑໖໕ Burmese ၁၁၆၅

Digit at this position in famous constants

π — Pi (π): Digit 1,165 = 9
e — Euler's number (e): Digit 1,165 = 3
φ — Golden ratio (φ): Digit 1,165 = 4
√2 — Pythagoras's (√2): Digit 1,165 = 8
ln 2 — Natural log of 2: Digit 1,165 = 5
γ — Euler-Mascheroni (γ): Digit 1,165 = 7

Also seen as

Unicode codepoint

Cyrillic Small Letter Semisoft Sign

U+048D

Lowercase letter (Ll)

UTF-8 encoding: D2 8D (2 bytes).

Lookup U+048D on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00048D

RGB(0, 4, 141)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.141.

Address: 0.0.4.141
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.4.141

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

Position in π

The digit sequence 1165 first appears in π at position 1,503 of the decimal expansion (the 1,503ordinal-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.

Look up 1165 on Pi Search ↗