13,845
13,845 is a composite number, odd.
13,845 (thirteen thousand eight hundred forty-five) is an odd 5-digit number. It is a composite number with 16 divisors, and factors as 3 × 5 × 13 × 71. Written other ways, in hexadecimal, 0x3615.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 21
- Digit product
- 480
- Digital root
- 3
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 54,831
- Recamán's sequence
- a(21,026) = 13,845
- Square (n²)
- 191,684,025
- Cube (n³)
- 2,653,865,326,125
- Divisor count
- 16
- σ(n) — sum of divisors
- 24,192
- φ(n) — Euler's totient
- 6,720
- Sum of prime factors
- 92
Primality
Prime factorization: 3 × 5 × 13 × 71
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√13,845 = [117; (1, 1, 1, 58, 6, 58, 1, 1, 1, 234)]
Period length 10 — the block in parentheses repeats forever.
Representations
- In words
- thirteen thousand eight hundred forty-five
- Ordinal
- 13845th
- Binary
- 11011000010101
- Octal
- 33025
- Hexadecimal
- 0x3615
- Base64
- NhU=
- One's complement
- 51,690 (16-bit)
- Scientific notation
- 1.3845 × 10⁴
- As a duration
- 13,845 s = 3 hours, 50 minutes, 45 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιγωμεʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋬·𝋥
- Chinese
- 一萬三千八百四十五
- Chinese (financial)
- 壹萬參仟捌佰肆拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,845 = 9
- e — Euler's number (e)
- Digit 13,845 = 7
- φ — Golden ratio (φ)
- Digit 13,845 = 4
- √2 — Pythagoras's (√2)
- Digit 13,845 = 0
- ln 2 — Natural log of 2
- Digit 13,845 = 8
- γ — Euler-Mascheroni (γ)
- Digit 13,845 = 3
Also seen as
UTF-8 encoding: E3 98 95 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.54.21.
- Address
- 0.0.54.21
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.54.21
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 13,845 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A9 (14080 Hz, -29¢)
- Scientific pitch (C4 = 256 Hz): A9 (13777.2 Hz, +8¢)
- Baroque pitch (A4 = 415 Hz): A♯9 (14069.7 Hz, -28¢)
The digit sequence 13845 first appears in π at position 24,773 of the decimal expansion (the 24,773ordinal-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.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.