139,520
139,520 is a composite number, even.
139,520 (one hundred thirty-nine thousand five hundred twenty) is an even 6-digit number. It is a composite number with 36 divisors, and factors as 2⁸ × 5 × 109. Its proper divisors sum to 197,740, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22100.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 25,931
- Recamán's sequence
- a(489,787) = 139,520
- Square (n²)
- 19,465,830,400
- Cube (n³)
- 2,715,872,657,408,000
- Divisor count
- 36
- σ(n) — sum of divisors
- 337,260
- φ(n) — Euler's totient
- 55,296
- Sum of prime factors
- 130
Primality
Prime factorization: 2 8 × 5 × 109
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,520 = [373; (1, 1, 10, 46, 1, 1, 2, 7, 1, 185, 1, 7, 2, 1, 1, 46, 10, 1, 1, 746)]
Period length 20 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand five hundred twenty
- Ordinal
- 139520th
- Binary
- 100010000100000000
- Octal
- 420400
- Hexadecimal
- 0x22100
- Base64
- AiEA
- One's complement
- 4,294,827,775 (32-bit)
- Scientific notation
- 1.3952 × 10⁵
- As a duration
- 139,520 s = 1 day, 14 hours, 45 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρλθφκʹ
- Mayan (base 20)
- 𝋱·𝋨·𝋰·𝋠
- Chinese
- 一十三萬九千五百二十
- Chinese (financial)
- 壹拾參萬玖仟伍佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139520, here are decompositions:
- 19 + 139501 = 139520
- 37 + 139483 = 139520
- 61 + 139459 = 139520
- 97 + 139423 = 139520
- 127 + 139393 = 139520
- 151 + 139369 = 139520
- 181 + 139339 = 139520
- 211 + 139309 = 139520
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 84 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.33.0.
- Address
- 0.2.33.0
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.33.0
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 139,520 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.