142,391
142,391 is a prime, odd.
142,391 (one hundred forty-two thousand three hundred ninety-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x22C37.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 216
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 193,241
- Recamán's sequence
- a(40,094) = 142,391
- Square (n²)
- 20,275,196,881
- Cube (n³)
- 2,887,005,559,082,471
- Divisor count
- 2
- σ(n) — sum of divisors
- 142,392
- φ(n) — Euler's totient
- 142,390
Primality
142,391 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,391 = [377; (2, 1, 7, 3, 1, 1, 1, 1, 6, 2, 3, 1, 5, 1, 1, 3, 3, 2, 3, 2, 1, 3, 1, 2, …)]
Representations
- In words
- one hundred forty-two thousand three hundred ninety-one
- Ordinal
- 142391st
- Binary
- 100010110000110111
- Octal
- 426067
- Hexadecimal
- 0x22C37
- Base64
- Aiw3
- One's complement
- 4,294,824,904 (32-bit)
- Scientific notation
- 1.42391 × 10⁵
- As a duration
- 142,391 s = 1 day, 15 hours, 33 minutes, 11 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρμβτϟαʹ
- Mayan (base 20)
- 𝋱·𝋯·𝋳·𝋫
- Chinese
- 一十四萬二千三百九十一
- Chinese (financial)
- 壹拾肆萬貳仟參佰玖拾壹
Also seen as
UTF-8 encoding: F0 A2 B0 B7 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.44.55.
- Address
- 0.2.44.55
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.44.55
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 142,391 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 142391 first appears in π at position 181,827 of the decimal expansion (the 181,827ordinal-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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.