129,272
129,272 is a composite number, even.
129,272 (one hundred twenty-nine thousand two hundred seventy-two) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2³ × 11 × 13 × 113. Its proper divisors sum to 158,008, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1F8F8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 504
- Digital root
- 5
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 272,921
- Recamán's sequence
- a(231,096) = 129,272
- Square (n²)
- 16,711,249,984
- Cube (n³)
- 2,160,296,707,931,648
- Divisor count
- 32
- σ(n) — sum of divisors
- 287,280
- φ(n) — Euler's totient
- 53,760
- Sum of prime factors
- 143
Primality
Prime factorization: 2 3 × 11 × 13 × 113
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,272 = [359; (1, 1, 5, 6, 5, 1, 1, 718)]
Period length 8 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand two hundred seventy-two
- Ordinal
- 129272nd
- Binary
- 11111100011111000
- Octal
- 374370
- Hexadecimal
- 0x1F8F8
- Base64
- Afj4
- One's complement
- 4,294,838,023 (32-bit)
- Scientific notation
- 1.29272 × 10⁵
- As a duration
- 129,272 s = 1 day, 11 hours, 54 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρκθσοβʹ
- Mayan (base 20)
- 𝋰·𝋣·𝋣·𝋬
- Chinese
- 一十二萬九千二百七十二
- Chinese (financial)
- 壹拾貳萬玖仟貳佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129272, here are decompositions:
- 43 + 129229 = 129272
- 79 + 129193 = 129272
- 103 + 129169 = 129272
- 151 + 129121 = 129272
- 211 + 129061 = 129272
- 223 + 129049 = 129272
- 271 + 129001 = 129272
- 313 + 128959 = 129272
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.248.248.
- Address
- 0.1.248.248
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.248.248
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 129,272 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 129272 first appears in π at position 381,492 of the decimal expansion (the 381,492ordinal-suffix:nd 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.