131,445
131,445 is a composite number, odd.
131,445 (one hundred thirty-one thousand four hundred forty-five) is an odd 6-digit number. It is a composite number with 24 divisors, and factors as 3² × 5 × 23 × 127. Written other ways, in hexadecimal, 0x20175.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 240
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 544,131
- Recamán's sequence
- a(229,482) = 131,445
- Square (n²)
- 17,277,788,025
- Cube (n³)
- 2,271,078,846,946,125
- Divisor count
- 24
- σ(n) — sum of divisors
- 239,616
- φ(n) — Euler's totient
- 66,528
- Sum of prime factors
- 161
Primality
Prime factorization: 3 2 × 5 × 23 × 127
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,445 = [362; (1, 1, 4, 5, 1, 1, 1, 2, 35, 1, 7, 5, 1, 2, 1, 1, 2, 180, 1, 7, 1, 22, 1, 1, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand four hundred forty-five
- Ordinal
- 131445th
- Binary
- 100000000101110101
- Octal
- 400565
- Hexadecimal
- 0x20175
- Base64
- AgF1
- One's complement
- 4,294,835,850 (32-bit)
- Scientific notation
- 1.31445 × 10⁵
- As a duration
- 131,445 s = 1 day, 12 hours, 30 minutes, 45 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαυμεʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋬·𝋥
- Chinese
- 一十三萬一千四百四十五
- Chinese (financial)
- 壹拾參萬壹仟肆佰肆拾伍
Also seen as
UTF-8 encoding: F0 A0 85 B5 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.117.
- Address
- 0.2.1.117
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.117
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 131,445 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 131445 first appears in π at position 443,992 of the decimal expansion (the 443,992ordinal-suffix:nd 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°.