129,472
129,472 is a composite number, even.
129,472 (one hundred twenty-nine thousand four hundred seventy-two) is an even 6-digit number. It is a composite number with 42 divisors, and factors as 2⁶ × 7 × 17². Its proper divisors sum to 182,440, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1F9C0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 1,008
- Digital root
- 7
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 274,921
- Recamán's sequence
- a(230,696) = 129,472
- Square (n²)
- 16,762,998,784
- Cube (n³)
- 2,170,338,978,562,048
- Divisor count
- 42
- σ(n) — sum of divisors
- 311,912
- φ(n) — Euler's totient
- 52,224
- Sum of prime factors
- 53
Primality
Prime factorization: 2 6 × 7 × 17 2
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,472 = [359; (1, 4, 1, 1, 1, 1, 1, 10, 1, 1, 1, 1, 1, 4, 1, 718)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand four hundred seventy-two
- Ordinal
- 129472nd
- Binary
- 11111100111000000
- Octal
- 374700
- Hexadecimal
- 0x1F9C0
- Base64
- AfnA
- One's complement
- 4,294,837,823 (32-bit)
- Scientific notation
- 1.29472 × 10⁵
- As a duration
- 129,472 s = 1 day, 11 hours, 57 minutes, 52 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρκθυοβʹ
- Mayan (base 20)
- 𝋰·𝋣·𝋭·𝋬
- Chinese
- 一十二萬九千四百七十二
- Chinese (financial)
- 壹拾貳萬玖仟肆佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129472, here are decompositions:
- 3 + 129469 = 129472
- 11 + 129461 = 129472
- 23 + 129449 = 129472
- 29 + 129443 = 129472
- 53 + 129419 = 129472
- 71 + 129401 = 129472
- 131 + 129341 = 129472
- 179 + 129293 = 129472
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F A7 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.249.192.
- Address
- 0.1.249.192
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.249.192
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 129,472 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.