138,126
138,126 is a composite number, even.
138,126 (one hundred thirty-eight thousand one hundred twenty-six) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 3 × 23,021. Its proper divisors sum to 138,138, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B8E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 288
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 621,831
- Recamán's sequence
- a(492,575) = 138,126
- Square (n²)
- 19,078,791,876
- Cube (n³)
- 2,635,277,206,664,376
- Divisor count
- 8
- σ(n) — sum of divisors
- 276,264
- φ(n) — Euler's totient
- 46,040
- Sum of prime factors
- 23,026
Primality
Prime factorization: 2 × 3 × 23021
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,126 = [371; (1, 1, 1, 7, 1, 1, 148, 7, 1, 1, 1, 9, 1, 28, 1, 4, 1, 3, 52, 1, 4, 1, 27, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand one hundred twenty-six
- Ordinal
- 138126th
- Binary
- 100001101110001110
- Octal
- 415616
- Hexadecimal
- 0x21B8E
- Base64
- AhuO
- One's complement
- 4,294,829,169 (32-bit)
- Scientific notation
- 1.38126 × 10⁵
- As a duration
- 138,126 s = 1 day, 14 hours, 22 minutes, 6 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληρκϛʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋦·𝋦
- Chinese
- 一十三萬八千一百二十六
- Chinese (financial)
- 壹拾參萬捌仟壹佰貳拾陸
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138126, here are decompositions:
- 13 + 138113 = 138126
- 19 + 138107 = 138126
- 47 + 138079 = 138126
- 67 + 138059 = 138126
- 73 + 138053 = 138126
- 127 + 137999 = 138126
- 179 + 137947 = 138126
- 193 + 137933 = 138126
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AE 8E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.142.
- Address
- 0.2.27.142
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.142
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 138,126 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.