131,921
131,921 is a composite number, odd.
131,921 (one hundred thirty-one thousand nine hundred twenty-one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 29 × 4,549. Written other ways, in hexadecimal, 0x20351.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 54
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 129,131
- Recamán's sequence
- a(228,530) = 131,921
- Square (n²)
- 17,403,150,241
- Cube (n³)
- 2,295,840,982,942,961
- Divisor count
- 4
- σ(n) — sum of divisors
- 136,500
- φ(n) — Euler's totient
- 127,344
- Sum of prime factors
- 4,578
Primality
Prime factorization: 29 × 4549
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,921 = [363; (4, 1, 3, 2, 144, 1, 5, 3, 11, 28, 1, 30, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 6, 8, …)]
Representations
- In words
- one hundred thirty-one thousand nine hundred twenty-one
- Ordinal
- 131921st
- Binary
- 100000001101010001
- Octal
- 401521
- Hexadecimal
- 0x20351
- Base64
- AgNR
- One's complement
- 4,294,835,374 (32-bit)
- Scientific notation
- 1.31921 × 10⁵
- As a duration
- 131,921 s = 1 day, 12 hours, 38 minutes, 41 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλαϡκαʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋰·𝋡
- Chinese
- 一十三萬一千九百二十一
- Chinese (financial)
- 壹拾參萬壹仟玖佰貳拾壹
Also seen as
UTF-8 encoding: F0 A0 8D 91 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.3.81.
- Address
- 0.2.3.81
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.3.81
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,921 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 131921 first appears in π at position 413,519 of the decimal expansion (the 413,519ordinal-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.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.