139,872
139,872 is a composite number, even.
139,872 (one hundred thirty-nine thousand eight hundred seventy-two) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2⁵ × 3 × 31 × 47. Its proper divisors sum to 247,200, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22260.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 30
- Digit product
- 3,024
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 278,931
- Recamán's sequence
- a(489,083) = 139,872
- Square (n²)
- 19,564,176,384
- Cube (n³)
- 2,736,480,479,182,848
- Divisor count
- 48
- σ(n) — sum of divisors
- 387,072
- φ(n) — Euler's totient
- 44,160
- Sum of prime factors
- 91
Primality
Prime factorization: 2 5 × 3 × 31 × 47
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,872 = [373; (1, 185, 1, 746)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand eight hundred seventy-two
- Ordinal
- 139872nd
- Binary
- 100010001001100000
- Octal
- 421140
- Hexadecimal
- 0x22260
- Base64
- AiJg
- One's complement
- 4,294,827,423 (32-bit)
- Scientific notation
- 1.39872 × 10⁵
- As a duration
- 139,872 s = 1 day, 14 hours, 51 minutes, 12 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹 𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλθωοβʹ
- Mayan (base 20)
- 𝋱·𝋩·𝋭·𝋬
- Chinese
- 一十三萬九千八百七十二
- Chinese (financial)
- 壹拾參萬玖仟捌佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139872, here are decompositions:
- 11 + 139861 = 139872
- 41 + 139831 = 139872
- 59 + 139813 = 139872
- 71 + 139801 = 139872
- 113 + 139759 = 139872
- 151 + 139721 = 139872
- 163 + 139709 = 139872
- 191 + 139681 = 139872
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 89 A0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.34.96.
- Address
- 0.2.34.96
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.34.96
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 139,872 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 139872 first appears in π at position 589,243 of the decimal expansion (the 589,243ordinal-suffix:rd digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.