138,081
138,081 is a composite number, odd.
138,081 (one hundred thirty-eight thousand eighty-one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 3 × 46,027. Written other ways, in hexadecimal, 0x21B61.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 180,831
- Recamán's sequence
- a(492,665) = 138,081
- Square (n²)
- 19,066,362,561
- Cube (n³)
- 2,632,702,408,785,441
- Divisor count
- 4
- σ(n) — sum of divisors
- 184,112
- φ(n) — Euler's totient
- 92,052
- Sum of prime factors
- 46,030
Primality
Prime factorization: 3 × 46027
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,081 = [371; (1, 1, 2, 4, 1, 17, 1, 3, 3, 1, 31, 1, 1, 4, 1, 3, 4, 1, 1, 7, 9, 6, 2, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand eighty-one
- Ordinal
- 138081st
- Binary
- 100001101101100001
- Octal
- 415541
- Hexadecimal
- 0x21B61
- Base64
- Ahth
- One's complement
- 4,294,829,214 (32-bit)
- Scientific notation
- 1.38081 × 10⁵
- As a duration
- 138,081 s = 1 day, 14 hours, 21 minutes, 21 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρληπαʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋤·𝋡
- Chinese
- 一十三萬八千零八十一
- Chinese (financial)
- 壹拾參萬捌仟零捌拾壹
Also seen as
UTF-8 encoding: F0 A1 AD A1 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.97.
- Address
- 0.2.27.97
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.97
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 138,081 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138081 first appears in π at position 639,337 of the decimal expansion (the 639,337ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.