2,142
2,142 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 9
- Digit product
- 16
- Digital root
- 9
- Palindrome
- No
- Bit width
- 12 bits
- Reversed
- 2,412
- Recamán's sequence
- a(3,467) = 2,142
- Square (n²)
- 4,588,164
- Cube (n³)
- 9,827,847,288
- Divisor count
- 24
- σ(n) — sum of divisors
- 5,616
- φ(n) — Euler's totient
- 576
- Sum of prime factors
- 32
Primality
Prime factorization: 2 × 3 2 × 7 × 17
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- two thousand one hundred forty-two
- Ordinal
- 2142nd
- Roman numeral
- MMCXLII
- Binary
- 100001011110
- Octal
- 4136
- Hexadecimal
- 0x85E
- Base64
- CF4=
- One's complement
- 63,393 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵βρμβʹ
- Mayan (base 20)
- 𝋥·𝋧·𝋢
- Chinese
- 二千一百四十二
- Chinese (financial)
- 貳仟壹佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,142 = 2
- e — Euler's number (e)
- Digit 2,142 = 9
- φ — Golden ratio (φ)
- Digit 2,142 = 7
- √2 — Pythagoras's (√2)
- Digit 2,142 = 6
- ln 2 — Natural log of 2
- Digit 2,142 = 7
- γ — Euler-Mascheroni (γ)
- Digit 2,142 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 2142, here are decompositions:
- 5 + 2137 = 2142
- 11 + 2131 = 2142
- 13 + 2129 = 2142
- 29 + 2113 = 2142
- 31 + 2111 = 2142
- 43 + 2099 = 2142
- 53 + 2089 = 2142
- 59 + 2083 = 2142
Showing the first eight; more decompositions exist.
UTF-8 encoding: E0 A1 9E (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.8.94.
- Address
- 0.0.8.94
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.8.94
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 2142 first appears in π at position 14,061 of the decimal expansion (the 14,061ordinal-suffix:st 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.