131,490
131,490 is a composite number, even.
131,490 (one hundred thirty-one thousand four hundred ninety) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2 × 3³ × 5 × 487. Its proper divisors sum to 219,870, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x201A2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 94,131
- Recamán's sequence
- a(229,392) = 131,490
- Square (n²)
- 17,289,620,100
- Cube (n³)
- 2,273,412,146,949,000
- Divisor count
- 32
- σ(n) — sum of divisors
- 351,360
- φ(n) — Euler's totient
- 34,992
- Sum of prime factors
- 503
Primality
Prime factorization: 2 × 3 3 × 5 × 487
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,490 = [362; (1, 1, 1, 1, 1, 1, 51, 5, 2, 1, 5, 14, 1, 1, 1, 1, 1, 79, 1, 22, 2, 2, 5, 2, …)]
Period length 52 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand four hundred ninety
- Ordinal
- 131490th
- Binary
- 100000000110100010
- Octal
- 400642
- Hexadecimal
- 0x201A2
- Base64
- AgGi
- One's complement
- 4,294,835,805 (32-bit)
- Scientific notation
- 1.3149 × 10⁵
- As a duration
- 131,490 s = 1 day, 12 hours, 31 minutes, 30 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρλαυϟʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋮·𝋪
- Chinese
- 一十三萬一千四百九十
- Chinese (financial)
- 壹拾參萬壹仟肆佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131490, here are decompositions:
- 11 + 131479 = 131490
- 13 + 131477 = 131490
- 41 + 131449 = 131490
- 43 + 131447 = 131490
- 53 + 131437 = 131490
- 59 + 131431 = 131490
- 109 + 131381 = 131490
- 127 + 131363 = 131490
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 86 A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.162.
- Address
- 0.2.1.162
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.162
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 131,490 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 131490 first appears in π at position 146,763 of the decimal expansion (the 146,763ordinal-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°.