138,321
138,321 is a composite number, odd.
138,321 (one hundred thirty-eight thousand three hundred twenty-one) is an odd 6-digit number. It is a composite number with 16 divisors, and factors as 3³ × 47 × 109. Written other ways, in hexadecimal, 0x21C51.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 144
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 123,831
- Recamán's sequence
- a(492,185) = 138,321
- Square (n²)
- 19,132,699,041
- Cube (n³)
- 2,646,454,064,050,161
- Divisor count
- 16
- σ(n) — sum of divisors
- 211,200
- φ(n) — Euler's totient
- 89,424
- Sum of prime factors
- 165
Primality
Prime factorization: 3 3 × 47 × 109
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,321 = [371; (1, 10, 1, 4, 4, 1, 2, 4, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 15, 1, 3, 1, 20, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand three hundred twenty-one
- Ordinal
- 138321st
- Binary
- 100001110001010001
- Octal
- 416121
- Hexadecimal
- 0x21C51
- Base64
- AhxR
- One's complement
- 4,294,828,974 (32-bit)
- Scientific notation
- 1.38321 × 10⁵
- As a duration
- 138,321 s = 1 day, 14 hours, 25 minutes, 21 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλητκαʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋰·𝋡
- Chinese
- 一十三萬八千三百二十一
- Chinese (financial)
- 壹拾參萬捌仟參佰貳拾壹
Also seen as
UTF-8 encoding: F0 A1 B1 91 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.81.
- Address
- 0.2.28.81
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.81
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 138,321 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°.