42,642
42,642 is a composite number, even.
42,642 (forty-two thousand six hundred forty-two) is an even 5-digit number. It is a composite number with 24 divisors, and factors as 2 × 3² × 23 × 103. Its proper divisors sum to 54,702, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xA692.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 384
- Digital root
- 9
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 24,624
- Recamán's sequence
- a(73,308) = 42,642
- Square (n²)
- 1,818,340,164
- Cube (n³)
- 77,537,661,273,288
- Divisor count
- 24
- σ(n) — sum of divisors
- 97,344
- φ(n) — Euler's totient
- 13,464
- Sum of prime factors
- 134
Primality
Prime factorization: 2 × 3 2 × 23 × 103
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√42,642 = [206; (2, 412)]
Period length 2 — the block in parentheses repeats forever.
Representations
- In words
- forty-two thousand six hundred forty-two
- Ordinal
- 42642nd
- Binary
- 1010011010010010
- Octal
- 123222
- Hexadecimal
- 0xA692
- Base64
- ppI=
- One's complement
- 22,893 (16-bit)
- Scientific notation
- 4.2642 × 10⁴
- As a duration
- 42,642 s = 11 hours, 50 minutes, 42 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵μβχμβʹ
- Mayan (base 20)
- 𝋥·𝋦·𝋬·𝋢
- Chinese
- 四萬二千六百四十二
- Chinese (financial)
- 肆萬貳仟陸佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,642 = 1
- e — Euler's number (e)
- Digit 42,642 = 5
- φ — Golden ratio (φ)
- Digit 42,642 = 5
- √2 — Pythagoras's (√2)
- Digit 42,642 = 6
- ln 2 — Natural log of 2
- Digit 42,642 = 9
- γ — Euler-Mascheroni (γ)
- Digit 42,642 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42642, here are decompositions:
- 31 + 42611 = 42642
- 53 + 42589 = 42642
- 71 + 42571 = 42642
- 73 + 42569 = 42642
- 109 + 42533 = 42642
- 151 + 42491 = 42642
- 179 + 42463 = 42642
- 181 + 42461 = 42642
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 9A 92 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.166.146.
- Address
- 0.0.166.146
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.166.146
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42642 first appears in π at position 110,378 of the decimal expansion (the 110,378ordinal-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°.