131,729
131,729 is a composite number, odd.
131,729 (one hundred thirty-one thousand seven hundred twenty-nine) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 13 × 10,133. Written other ways, in hexadecimal, 0x20291.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 378
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 927,131
- Recamán's sequence
- a(228,914) = 131,729
- Square (n²)
- 17,352,529,441
- Cube (n³)
- 2,285,831,350,733,489
- Divisor count
- 4
- σ(n) — sum of divisors
- 141,876
- φ(n) — Euler's totient
- 121,584
- Sum of prime factors
- 10,146
Primality
Prime factorization: 13 × 10133
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,729 = [362; (1, 17, 6, 1, 2, 1, 2, 6, 1, 1, 1, 1, 2, 10, 1, 3, 1, 1, 1, 1, 1, 44, 1, 2, …)]
Representations
- In words
- one hundred thirty-one thousand seven hundred twenty-nine
- Ordinal
- 131729th
- Binary
- 100000001010010001
- Octal
- 401221
- Hexadecimal
- 0x20291
- Base64
- AgKR
- One's complement
- 4,294,835,566 (32-bit)
- Scientific notation
- 1.31729 × 10⁵
- As a duration
- 131,729 s = 1 day, 12 hours, 35 minutes, 29 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαψκθʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋦·𝋩
- Chinese
- 一十三萬一千七百二十九
- Chinese (financial)
- 壹拾參萬壹仟柒佰貳拾玖
Also seen as
UTF-8 encoding: F0 A0 8A 91 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.2.145.
- Address
- 0.2.2.145
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.2.145
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 131,729 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.