139,042
139,042 is a composite number, even.
139,042 (one hundred thirty-nine thousand forty-two) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 19 × 3,659. Written other ways, in hexadecimal, 0x21F22.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 19
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 240,931
- Recamán's sequence
- a(490,743) = 139,042
- Square (n²)
- 19,332,677,764
- Cube (n³)
- 2,688,054,181,662,088
- Divisor count
- 8
- σ(n) — sum of divisors
- 219,600
- φ(n) — Euler's totient
- 65,844
- Sum of prime factors
- 3,680
Primality
Prime factorization: 2 × 19 × 3659
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,042 = [372; (1, 7, 1, 1, 2, 1, 9, 1, 3, 1, 2, 3, 2, 1, 5, 11, 1, 5, 1, 4, 53, 15, 1, 5, …)]
Representations
- In words
- one hundred thirty-nine thousand forty-two
- Ordinal
- 139042nd
- Binary
- 100001111100100010
- Octal
- 417442
- Hexadecimal
- 0x21F22
- Base64
- Ah8i
- One's complement
- 4,294,828,253 (32-bit)
- Scientific notation
- 1.39042 × 10⁵
- As a duration
- 139,042 s = 1 day, 14 hours, 37 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλθμβʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋬·𝋢
- Chinese
- 一十三萬九千零四十二
- Chinese (financial)
- 壹拾參萬玖仟零肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139042, here are decompositions:
- 83 + 138959 = 139042
- 149 + 138893 = 139042
- 173 + 138869 = 139042
- 179 + 138863 = 139042
- 311 + 138731 = 139042
- 359 + 138683 = 139042
- 401 + 138641 = 139042
- 443 + 138599 = 139042
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 BC A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.31.34.
- Address
- 0.2.31.34
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.31.34
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 139,042 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.