138,142
138,142 is a composite number, even.
138,142 (one hundred thirty-eight thousand one hundred forty-two) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2 × 17² × 239. Written other ways, in hexadecimal, 0x21B9E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 19
- Digit product
- 192
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 241,831
- Recamán's sequence
- a(492,543) = 138,142
- Square (n²)
- 19,083,212,164
- Cube (n³)
- 2,636,193,094,759,288
- Divisor count
- 12
- σ(n) — sum of divisors
- 221,040
- φ(n) — Euler's totient
- 64,736
- Sum of prime factors
- 275
Primality
Prime factorization: 2 × 17 2 × 239
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,142 = [371; (1, 2, 13, 1, 2, 4, 17, 2, 7, 2, 2, 1, 2, 2, 2, 1, 4, 1, 2, 8, 1, 4, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand one hundred forty-two
- Ordinal
- 138142nd
- Binary
- 100001101110011110
- Octal
- 415636
- Hexadecimal
- 0x21B9E
- Base64
- Ahue
- One's complement
- 4,294,829,153 (32-bit)
- Scientific notation
- 1.38142 × 10⁵
- As a duration
- 138,142 s = 1 day, 14 hours, 22 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληρμβʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋧·𝋢
- Chinese
- 一十三萬八千一百四十二
- Chinese (financial)
- 壹拾參萬捌仟壹佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138142, here are decompositions:
- 3 + 138139 = 138142
- 29 + 138113 = 138142
- 41 + 138101 = 138142
- 71 + 138071 = 138142
- 83 + 138059 = 138142
- 89 + 138053 = 138142
- 101 + 138041 = 138142
- 149 + 137993 = 138142
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AE 9E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.158.
- Address
- 0.2.27.158
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.158
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 138,142 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.