42,009
42,009 is a composite number, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 15
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 90,024
- Recamán's sequence
- a(151,605) = 42,009
- Square (n²)
- 1,764,756,081
- Cube (n³)
- 74,135,638,206,729
- Divisor count
- 16
- σ(n) — sum of divisors
- 65,280
- φ(n) — Euler's totient
- 23,760
- Sum of prime factors
- 100
Primality
Prime factorization: 3 × 11 × 19 × 67
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand nine
- Ordinal
- 42009th
- Binary
- 1010010000011001
- Octal
- 122031
- Hexadecimal
- 0xA419
- Base64
- pBk=
- One's complement
- 23,526 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβθʹ
- Mayan (base 20)
- 𝋥·𝋥·𝋠·𝋩
- Chinese
- 四萬二千零九
- Chinese (financial)
- 肆萬貳仟零玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,009 = 2
- e — Euler's number (e)
- Digit 42,009 = 9
- φ — Golden ratio (φ)
- Digit 42,009 = 2
- √2 — Pythagoras's (√2)
- Digit 42,009 = 1
- ln 2 — Natural log of 2
- Digit 42,009 = 8
- γ — Euler-Mascheroni (γ)
- Digit 42,009 = 6
Also seen as
UTF-8 encoding: EA 90 99 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.164.25.
- Address
- 0.0.164.25
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.164.25
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42009 first appears in π at position 29,023 of the decimal expansion (the 29,023ordinal-suffix:rd 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.