77,142
77,142 is a composite number, even.
77,142 (seventy-seven thousand one hundred forty-two) is an even 5-digit number. It is a composite number with 32 divisors, and factors as 2 × 3 × 13 × 23 × 43. Its proper divisors sum to 100,266, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x12D56.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 21
- Digit product
- 392
- Digital root
- 3
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 24,177
- Square (n²)
- 5,950,888,164
- Cube (n³)
- 459,063,414,747,288
- Divisor count
- 32
- σ(n) — sum of divisors
- 177,408
- φ(n) — Euler's totient
- 22,176
- Sum of prime factors
- 84
Primality
Prime factorization: 2 × 3 × 13 × 23 × 43
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√77,142 = [277; (1, 2, 1, 10, 1, 1, 2, 2, 1, 1, 2, 3, 1, 1, 1, 1, 3, 1, 1, 6, 1, 1, 3, 1, …)]
Period length 40 — the block in parentheses repeats forever.
Representations
- In words
- seventy-seven thousand one hundred forty-two
- Ordinal
- 77142nd
- Binary
- 10010110101010110
- Octal
- 226526
- Hexadecimal
- 0x12D56
- Base64
- AS1W
- One's complement
- 4,294,890,153 (32-bit)
- Scientific notation
- 7.7142 × 10⁴
- As a duration
- 77,142 s = 21 hours, 25 minutes, 42 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵οζρμβʹ
- Mayan (base 20)
- 𝋩·𝋬·𝋱·𝋢
- Chinese
- 七萬七千一百四十二
- Chinese (financial)
- 柒萬柒仟壹佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 77,142 = 2
- e — Euler's number (e)
- Digit 77,142 = 5
- φ — Golden ratio (φ)
- Digit 77,142 = 5
- √2 — Pythagoras's (√2)
- Digit 77,142 = 1
- ln 2 — Natural log of 2
- Digit 77,142 = 4
- γ — Euler-Mascheroni (γ)
- Digit 77,142 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 77142, here are decompositions:
- 5 + 77137 = 77142
- 41 + 77101 = 77142
- 61 + 77081 = 77142
- 73 + 77069 = 77142
- 101 + 77041 = 77142
- 113 + 77029 = 77142
- 139 + 77003 = 77142
- 151 + 76991 = 77142
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.45.86.
- Address
- 0.1.45.86
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.45.86
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 77142 first appears in π at position 58,338 of the decimal expansion (the 58,338ordinal-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°.