138,123
138,123 is a composite number, odd.
138,123 (one hundred thirty-eight thousand one hundred twenty-three) is an odd 6-digit number. It is a composite number with 12 divisors, and factors as 3² × 103 × 149. Written other ways, in hexadecimal, 0x21B8B.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 144
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 321,831
- Recamán's sequence
- a(492,581) = 138,123
- Square (n²)
- 19,077,963,129
- Cube (n³)
- 2,635,105,501,266,867
- Divisor count
- 12
- σ(n) — sum of divisors
- 202,800
- φ(n) — Euler's totient
- 90,576
- Sum of prime factors
- 258
Primality
Prime factorization: 3 2 × 103 × 149
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,123 = [371; (1, 1, 1, 5, 1, 1, 1, 2, 1, 1, 2, 11, 1, 3, 1, 15, 2, 1, 3, 4, 1, 1, 2, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand one hundred twenty-three
- Ordinal
- 138123rd
- Binary
- 100001101110001011
- Octal
- 415613
- Hexadecimal
- 0x21B8B
- Base64
- AhuL
- One's complement
- 4,294,829,172 (32-bit)
- Scientific notation
- 1.38123 × 10⁵
- As a duration
- 138,123 s = 1 day, 14 hours, 22 minutes, 3 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹 𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληρκγʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋦·𝋣
- Chinese
- 一十三萬八千一百二十三
- Chinese (financial)
- 壹拾參萬捌仟壹佰貳拾參
Also seen as
UTF-8 encoding: F0 A1 AE 8B (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.139.
- Address
- 0.2.27.139
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.139
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 138,123 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°.