42,021
42,021 is a composite number, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 9
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 12,024
- Recamán's sequence
- a(151,581) = 42,021
- Square (n²)
- 1,765,764,441
- Cube (n³)
- 74,199,187,575,261
- Divisor count
- 24
- σ(n) — sum of divisors
- 74,880
- φ(n) — Euler's totient
- 22,176
- Sum of prime factors
- 65
Primality
Prime factorization: 3 2 × 7 × 23 × 29
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand twenty-one
- Ordinal
- 42021st
- Binary
- 1010010000100101
- Octal
- 122045
- Hexadecimal
- 0xA425
- Base64
- pCU=
- One's complement
- 23,514 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓎆𓎆𓏺
- Greek (Milesian)
- ͵μβκαʹ
- Mayan (base 20)
- 𝋥·𝋥·𝋡·𝋡
- Chinese
- 四萬二千零二十一
- Chinese (financial)
- 肆萬貳仟零貳拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,021 = 7
- e — Euler's number (e)
- Digit 42,021 = 5
- φ — Golden ratio (φ)
- Digit 42,021 = 1
- √2 — Pythagoras's (√2)
- Digit 42,021 = 0
- ln 2 — Natural log of 2
- Digit 42,021 = 4
- γ — Euler-Mascheroni (γ)
- Digit 42,021 = 0
Also seen as
UTF-8 encoding: EA 90 A5 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.164.37.
- Address
- 0.0.164.37
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.164.37
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42021 first appears in π at position 4,350 of the decimal expansion (the 4,350ordinal-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.