138,143
138,143 is a prime, odd.
138,143 (one hundred thirty-eight thousand one hundred forty-three) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x21B9F.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 288
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 341,831
- Recamán's sequence
- a(492,541) = 138,143
- Square (n²)
- 19,083,488,449
- Cube (n³)
- 2,636,250,344,810,207
- Divisor count
- 2
- σ(n) — sum of divisors
- 138,144
- φ(n) — Euler's totient
- 138,142
Primality
138,143 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,143 = [371; (1, 2, 11, 1, 1, 1, 9, 1, 4, 3, 23, 1, 2, 371, 2, 1, 23, 3, 4, 1, 9, 1, 1, 1, …)]
Period length 28 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand one hundred forty-three
- Ordinal
- 138143rd
- Binary
- 100001101110011111
- Octal
- 415637
- Hexadecimal
- 0x21B9F
- Base64
- Ahuf
- One's complement
- 4,294,829,152 (32-bit)
- Scientific notation
- 1.38143 × 10⁵
- As a duration
- 138,143 s = 1 day, 14 hours, 22 minutes, 23 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹 𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληρμγʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋧·𝋣
- Chinese
- 一十三萬八千一百四十三
- Chinese (financial)
- 壹拾參萬捌仟壹佰肆拾參
Also seen as
UTF-8 encoding: F0 A1 AE 9F (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.159.
- Address
- 0.2.27.159
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.159
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 138,143 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.