138,725
138,725 is a composite number, odd.
138,725 (one hundred thirty-eight thousand seven hundred twenty-five) is an odd 6-digit number. It is a composite number with 12 divisors, and factors as 5² × 31 × 179. Written other ways, in hexadecimal, 0x21DE5.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 1,680
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 527,831
- Recamán's sequence
- a(491,377) = 138,725
- Square (n²)
- 19,244,625,625
- Cube (n³)
- 2,669,710,689,828,125
- Divisor count
- 12
- σ(n) — sum of divisors
- 178,560
- φ(n) — Euler's totient
- 106,800
- Sum of prime factors
- 220
Primality
Prime factorization: 5 2 × 31 × 179
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,725 = [372; (2, 5, 2, 5, 1, 2, 3, 4, 1, 2, 2, 1, 8, 1, 2, 1, 2, 185, 1, 6, 2, 1, 1, 1, …)]
Period length 54 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand seven hundred twenty-five
- Ordinal
- 138725th
- Binary
- 100001110111100101
- Octal
- 416745
- Hexadecimal
- 0x21DE5
- Base64
- Ah3l
- One's complement
- 4,294,828,570 (32-bit)
- Scientific notation
- 1.38725 × 10⁵
- As a duration
- 138,725 s = 1 day, 14 hours, 32 minutes, 5 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληψκεʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋰·𝋥
- Chinese
- 一十三萬八千七百二十五
- Chinese (financial)
- 壹拾參萬捌仟柒佰貳拾伍
Also seen as
UTF-8 encoding: F0 A1 B7 A5 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.229.
- Address
- 0.2.29.229
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.229
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 138,725 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.