2,542
2,542 is a composite number, even.
2,542 (two thousand five hundred forty-two) is an even 4-digit number. It is a composite number with 8 divisors, and factors as 2 × 31 × 41. Written other ways, in Roman numerals it is MMDXLII and in binary, 100111101110.
Interestingness
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 13
- Digit product
- 80
- Digital root
- 4
- Palindrome
- No
- Bit width
- 12 bits
- Reversed
- 2,452
- Recamán's sequence
- a(7,548) = 2,542
- Square (n²)
- 6,461,764
- Cube (n³)
- 16,425,804,088
- Divisor count
- 8
- σ(n) — sum of divisors
- 4,032
- φ(n) — Euler's totient
- 1,200
- Sum of prime factors
- 74
Primality
Prime factorization: 2 × 31 × 41
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√2,542 = [50; (2, 2, 1, 1, 3, 1, 4, 50, 4, 1, 3, 1, 1, 2, 2, 100)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- two thousand five hundred forty-two
- Ordinal
- 2542nd
- Roman numeral
- MMDXLII
- Binary
- 100111101110
- Octal
- 4756
- Hexadecimal
- 0x9EE
- Base64
- Ce4=
- One's complement
- 62,993 (16-bit)
- Scientific notation
- 2.542 × 10³
- As a duration
- 2,542 s = 42 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵βφμβʹ
- Mayan (base 20)
- 𝋦·𝋧·𝋢
- Chinese
- 二千五百四十二
- Chinese (financial)
- 貳仟伍佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,542 = 5
- e — Euler's number (e)
- Digit 2,542 = 4
- φ — Golden ratio (φ)
- Digit 2,542 = 0
- √2 — Pythagoras's (√2)
- Digit 2,542 = 5
- ln 2 — Natural log of 2
- Digit 2,542 = 4
- γ — Euler-Mascheroni (γ)
- Digit 2,542 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 2542, here are decompositions:
- 3 + 2539 = 2542
- 11 + 2531 = 2542
- 83 + 2459 = 2542
- 101 + 2441 = 2542
- 131 + 2411 = 2542
- 149 + 2393 = 2542
- 191 + 2351 = 2542
- 233 + 2309 = 2542
Showing the first eight; more decompositions exist.
UTF-8 encoding: E0 A7 AE (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.9.238.
- Address
- 0.0.9.238
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.9.238
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 2,542 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D♯7 (2489 Hz, +36¢)
- Scientific pitch (C4 = 256 Hz): E7 (2580.3 Hz, -26¢)
- Baroque pitch (A4 = 415 Hz): E7 (2487.2 Hz, +38¢)
The digit sequence 2542 first appears in π at position 1,747 of the decimal expansion (the 1,747ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.