129,672
129,672 is a composite number, even.
129,672 (one hundred twenty-nine thousand six hundred seventy-two) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2³ × 3² × 1,801. Its proper divisors sum to 221,718, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1FA88.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 27
- Digit product
- 1,512
- Digital root
- 9
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 276,921
- Recamán's sequence
- a(230,296) = 129,672
- Square (n²)
- 16,814,827,584
- Cube (n³)
- 2,180,412,322,472,448
- Divisor count
- 24
- σ(n) — sum of divisors
- 351,390
- φ(n) — Euler's totient
- 43,200
- Sum of prime factors
- 1,813
Primality
Prime factorization: 2 3 × 3 2 × 1801
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,672 = [360; (10, 720)]
Period length 2 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand six hundred seventy-two
- Ordinal
- 129672nd
- Binary
- 11111101010001000
- Octal
- 375210
- Hexadecimal
- 0x1FA88
- Base64
- AfqI
- One's complement
- 4,294,837,623 (32-bit)
- Scientific notation
- 1.29672 × 10⁵
- As a duration
- 129,672 s = 1 day, 12 hours, 1 minute, 12 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹 𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρκθχοβʹ
- Mayan (base 20)
- 𝋰·𝋤·𝋣·𝋬
- Chinese
- 一十二萬九千六百七十二
- Chinese (financial)
- 壹拾貳萬玖仟陸佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129672, here are decompositions:
- 29 + 129643 = 129672
- 31 + 129641 = 129672
- 41 + 129631 = 129672
- 43 + 129629 = 129672
- 79 + 129593 = 129672
- 83 + 129589 = 129672
- 139 + 129533 = 129672
- 163 + 129509 = 129672
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F AA 88 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.250.136.
- Address
- 0.1.250.136
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.250.136
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 129,672 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 129672 first appears in π at position 206,937 of the decimal expansion (the 206,937ordinal-suffix:th 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°.