42,420
42,420 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 2,424
- Recamán's sequence
- a(150,783) = 42,420
- Square (n²)
- 1,799,456,400
- Cube (n³)
- 76,332,940,488,000
- Divisor count
- 48
- σ(n) — sum of divisors
- 137,088
- φ(n) — Euler's totient
- 9,600
- Sum of prime factors
- 120
Primality
Prime factorization: 2 2 × 3 × 5 × 7 × 101
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand four hundred twenty
- Ordinal
- 42420th
- Binary
- 1010010110110100
- Octal
- 122664
- Hexadecimal
- 0xA5B4
- Base64
- pbQ=
- One's complement
- 23,115 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵μβυκʹ
- Mayan (base 20)
- 𝋥·𝋦·𝋡·𝋠
- Chinese
- 四萬二千四百二十
- Chinese (financial)
- 肆萬貳仟肆佰貳拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,420 = 3
- e — Euler's number (e)
- Digit 42,420 = 7
- φ — Golden ratio (φ)
- Digit 42,420 = 9
- √2 — Pythagoras's (√2)
- Digit 42,420 = 2
- ln 2 — Natural log of 2
- Digit 42,420 = 4
- γ — Euler-Mascheroni (γ)
- Digit 42,420 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42420, here are decompositions:
- 11 + 42409 = 42420
- 13 + 42407 = 42420
- 17 + 42403 = 42420
- 23 + 42397 = 42420
- 29 + 42391 = 42420
- 41 + 42379 = 42420
- 47 + 42373 = 42420
- 61 + 42359 = 42420
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 96 B4 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.165.180.
- Address
- 0.0.165.180
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.165.180
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42420 first appears in π at position 242,426 of the decimal expansion (the 242,426ordinal-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.