42,138
42,138 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 192
- Digital root
- 9
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 83,124
- Recamán's sequence
- a(151,347) = 42,138
- Square (n²)
- 1,775,611,044
- Cube (n³)
- 74,820,698,172,072
- Divisor count
- 12
- σ(n) — sum of divisors
- 91,338
- φ(n) — Euler's totient
- 14,040
- Sum of prime factors
- 2,349
Primality
Prime factorization: 2 × 3 2 × 2341
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand one hundred thirty-eight
- Ordinal
- 42138th
- Binary
- 1010010010011010
- Octal
- 122232
- Hexadecimal
- 0xA49A
- Base64
- pJo=
- One's complement
- 23,397 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβρληʹ
- Mayan (base 20)
- 𝋥·𝋥·𝋦·𝋲
- Chinese
- 四萬二千一百三十八
- Chinese (financial)
- 肆萬貳仟壹佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,138 = 7
- e — Euler's number (e)
- Digit 42,138 = 7
- φ — Golden ratio (φ)
- Digit 42,138 = 0
- √2 — Pythagoras's (√2)
- Digit 42,138 = 7
- ln 2 — Natural log of 2
- Digit 42,138 = 2
- γ — Euler-Mascheroni (γ)
- Digit 42,138 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42138, here are decompositions:
- 7 + 42131 = 42138
- 37 + 42101 = 42138
- 67 + 42071 = 42138
- 139 + 41999 = 42138
- 157 + 41981 = 42138
- 179 + 41959 = 42138
- 181 + 41957 = 42138
- 191 + 41947 = 42138
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 92 9A (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.164.154.
- Address
- 0.0.164.154
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.164.154
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42138 first appears in π at position 139,676 of the decimal expansion (the 139,676ordinal-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.