40,042
40,042 is a composite number, even.
40,042 (forty thousand forty-two) is an even 5-digit number. It is a composite number with 4 divisors, and factors as 2 × 20,021. Written other ways, in hexadecimal, 0x9C6A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 24,004
- Square (n²)
- 1,603,361,764
- Cube (n³)
- 64,201,811,754,088
- Divisor count
- 4
- σ(n) — sum of divisors
- 60,066
- φ(n) — Euler's totient
- 20,020
- Sum of prime factors
- 20,023
Primality
Prime factorization: 2 × 20021
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√40,042 = [200; (9, 1, 1, 9, 400)]
Period length 5 — the block in parentheses repeats forever.
Representations
- In words
- forty thousand forty-two
- Ordinal
- 40042nd
- Binary
- 1001110001101010
- Octal
- 116152
- Hexadecimal
- 0x9C6A
- Base64
- nGo=
- One's complement
- 25,493 (16-bit)
- Scientific notation
- 4.0042 × 10⁴
- As a duration
- 40,042 s = 11 hours, 7 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵μμβʹ
- Mayan (base 20)
- 𝋥·𝋠·𝋢·𝋢
- Chinese
- 四萬零四十二
- Chinese (financial)
- 肆萬零肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 40,042 = 9
- e — Euler's number (e)
- Digit 40,042 = 0
- φ — Golden ratio (φ)
- Digit 40,042 = 4
- √2 — Pythagoras's (√2)
- Digit 40,042 = 8
- ln 2 — Natural log of 2
- Digit 40,042 = 7
- γ — Euler-Mascheroni (γ)
- Digit 40,042 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 40042, here are decompositions:
- 3 + 40039 = 40042
- 5 + 40037 = 40042
- 11 + 40031 = 40042
- 29 + 40013 = 40042
- 53 + 39989 = 40042
- 59 + 39983 = 40042
- 71 + 39971 = 40042
- 89 + 39953 = 40042
Showing the first eight; more decompositions exist.
UTF-8 encoding: E9 B1 AA (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.156.106.
- Address
- 0.0.156.106
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.156.106
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 40042 first appears in π at position 111,489 of the decimal expansion (the 111,489ordinal-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.