138,071
138,071 is a prime, odd.
138,071 (one hundred thirty-eight thousand seventy-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x21B57.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 170,831
- Recamán's sequence
- a(492,685) = 138,071
- Square (n²)
- 19,063,601,041
- Cube (n³)
- 2,632,130,459,331,911
- Divisor count
- 2
- σ(n) — sum of divisors
- 138,072
- φ(n) — Euler's totient
- 138,070
Primality
138,071 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,071 = [371; (1, 1, 2, 1, 1, 1, 23, 2, 1, 13, 2, 1, 5, 1, 3, 1, 2, 2, 3, 2, 19, 8, 3, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand seventy-one
- Ordinal
- 138071st
- Binary
- 100001101101010111
- Octal
- 415527
- Hexadecimal
- 0x21B57
- Base64
- AhtX
- One's complement
- 4,294,829,224 (32-bit)
- Scientific notation
- 1.38071 × 10⁵
- As a duration
- 138,071 s = 1 day, 14 hours, 21 minutes, 11 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρληοαʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋣·𝋫
- Chinese
- 一十三萬八千零七十一
- Chinese (financial)
- 壹拾參萬捌仟零柒拾壹
Also seen as
UTF-8 encoding: F0 A1 AD 97 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.87.
- Address
- 0.2.27.87
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.87
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 138,071 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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.