42,128
42,128 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 17
- Digit product
- 128
- Digital root
- 8
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 82,124
- Recamán's sequence
- a(151,367) = 42,128
- Square (n²)
- 1,774,768,384
- Cube (n³)
- 74,767,442,481,152
- Divisor count
- 10
- σ(n) — sum of divisors
- 81,654
- φ(n) — Euler's totient
- 21,056
- Sum of prime factors
- 2,641
Primality
Prime factorization: 2 4 × 2633
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand one hundred twenty-eight
- Ordinal
- 42128th
- Binary
- 1010010010010000
- Octal
- 122220
- Hexadecimal
- 0xA490
- Base64
- pJA=
- One's complement
- 23,407 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβρκηʹ
- Mayan (base 20)
- 𝋥·𝋥·𝋦·𝋨
- Chinese
- 四萬二千一百二十八
- Chinese (financial)
- 肆萬貳仟壹佰貳拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,128 = 4
- e — Euler's number (e)
- Digit 42,128 = 6
- φ — Golden ratio (φ)
- Digit 42,128 = 2
- √2 — Pythagoras's (√2)
- Digit 42,128 = 3
- ln 2 — Natural log of 2
- Digit 42,128 = 6
- γ — Euler-Mascheroni (γ)
- Digit 42,128 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42128, here are decompositions:
- 67 + 42061 = 42128
- 109 + 42019 = 42128
- 181 + 41947 = 42128
- 241 + 41887 = 42128
- 277 + 41851 = 42128
- 367 + 41761 = 42128
- 409 + 41719 = 42128
- 487 + 41641 = 42128
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 92 90 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.164.144.
- Address
- 0.0.164.144
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.164.144
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42128 first appears in π at position 31,063 of the decimal expansion (the 31,063ordinal-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.