131,428
131,428 is a composite number, even.
131,428 (one hundred thirty-one thousand four hundred twenty-eight) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 11 × 29 × 103. Written other ways, in hexadecimal, 0x20164.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 19
- Digit product
- 192
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 824,131
- Recamán's sequence
- a(229,516) = 131,428
- Square (n²)
- 17,273,319,184
- Cube (n³)
- 2,270,197,793,714,752
- Divisor count
- 24
- σ(n) — sum of divisors
- 262,080
- φ(n) — Euler's totient
- 57,120
- Sum of prime factors
- 147
Primality
Prime factorization: 2 2 × 11 × 29 × 103
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,428 = [362; (1, 1, 7, 1, 5, 80, 2, 1, 1, 4, 1, 1, 5, 2, 1, 8, 3, 1, 3, 4, 1, 7, 14, 11, …)]
Representations
- In words
- one hundred thirty-one thousand four hundred twenty-eight
- Ordinal
- 131428th
- Binary
- 100000000101100100
- Octal
- 400544
- Hexadecimal
- 0x20164
- Base64
- AgFk
- One's complement
- 4,294,835,867 (32-bit)
- Scientific notation
- 1.31428 × 10⁵
- As a duration
- 131,428 s = 1 day, 12 hours, 30 minutes, 28 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαυκηʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋫·𝋨
- Chinese
- 一十三萬一千四百二十八
- Chinese (financial)
- 壹拾參萬壹仟肆佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131428, here are decompositions:
- 47 + 131381 = 131428
- 71 + 131357 = 131428
- 107 + 131321 = 131428
- 131 + 131297 = 131428
- 179 + 131249 = 131428
- 197 + 131231 = 131428
- 257 + 131171 = 131428
- 317 + 131111 = 131428
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 85 A4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.100.
- Address
- 0.2.1.100
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.100
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 131,428 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.