131,409
131,409 is a composite number, odd.
131,409 (one hundred thirty-one thousand four hundred nine) is an odd 6-digit number. It is a composite number with 16 divisors, and factors as 3³ × 31 × 157. Written other ways, in hexadecimal, 0x20151.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 904,131
- Recamán's sequence
- a(229,554) = 131,409
- Square (n²)
- 17,268,325,281
- Cube (n³)
- 2,269,213,356,850,929
- Divisor count
- 16
- σ(n) — sum of divisors
- 202,240
- φ(n) — Euler's totient
- 84,240
- Sum of prime factors
- 197
Primality
Prime factorization: 3 3 × 31 × 157
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,409 = [362; (1, 1, 65, 2, 2, 3, 1, 5, 4, 1, 1, 3, 3, 11, 42, 1, 1, 3, 1, 2, 1, 3, 7, 17, …)]
Representations
- In words
- one hundred thirty-one thousand four hundred nine
- Ordinal
- 131409th
- Binary
- 100000000101010001
- Octal
- 400521
- Hexadecimal
- 0x20151
- Base64
- AgFR
- One's complement
- 4,294,835,886 (32-bit)
- Scientific notation
- 1.31409 × 10⁵
- As a duration
- 131,409 s = 1 day, 12 hours, 30 minutes, 9 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαυθʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋪·𝋩
- Chinese
- 一十三萬一千四百零九
- Chinese (financial)
- 壹拾參萬壹仟肆佰零玖
Also seen as
UTF-8 encoding: F0 A0 85 91 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.81.
- Address
- 0.2.1.81
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.81
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 131,409 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 131409 first appears in π at position 210,238 of the decimal expansion (the 210,238ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.