139,020
139,020 is a composite number, even.
139,020 (one hundred thirty-nine thousand twenty) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2² × 3 × 5 × 7 × 331. Its proper divisors sum to 307,188, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21F0C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 15
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 20,931
- Recamán's sequence
- a(490,787) = 139,020
- Square (n²)
- 19,326,560,400
- Cube (n³)
- 2,686,778,426,808,000
- Divisor count
- 48
- σ(n) — sum of divisors
- 446,208
- φ(n) — Euler's totient
- 31,680
- Sum of prime factors
- 350
Primality
Prime factorization: 2 2 × 3 × 5 × 7 × 331
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,020 = [372; (1, 5, 1, 5, 2, 1, 4, 186, 4, 1, 2, 5, 1, 5, 1, 744)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand twenty
- Ordinal
- 139020th
- Binary
- 100001111100001100
- Octal
- 417414
- Hexadecimal
- 0x21F0C
- Base64
- Ah8M
- One's complement
- 4,294,828,275 (32-bit)
- Scientific notation
- 1.3902 × 10⁵
- As a duration
- 139,020 s = 1 day, 14 hours, 37 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆
- Greek (Milesian)
- ͵ρλθκʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋫·𝋠
- Chinese
- 一十三萬九千零二十
- Chinese (financial)
- 壹拾參萬玖仟零貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139020, here are decompositions:
- 43 + 138977 = 139020
- 53 + 138967 = 139020
- 61 + 138959 = 139020
- 83 + 138937 = 139020
- 97 + 138923 = 139020
- 103 + 138917 = 139020
- 127 + 138893 = 139020
- 131 + 138889 = 139020
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 BC 8C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.31.12.
- Address
- 0.2.31.12
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.31.12
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 139,020 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°.