129,442
129,442 is a composite number, even.
129,442 (one hundred twenty-nine thousand four hundred forty-two) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 61 × 1,061. Written other ways, in hexadecimal, 0x1F9A2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 576
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 244,921
- Recamán's sequence
- a(230,756) = 129,442
- Square (n²)
- 16,755,231,364
- Cube (n³)
- 2,168,830,658,218,888
- Divisor count
- 8
- σ(n) — sum of divisors
- 197,532
- φ(n) — Euler's totient
- 63,600
- Sum of prime factors
- 1,124
Primality
Prime factorization: 2 × 61 × 1061
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,442 = [359; (1, 3, 1, 1, 3, 1, 718)]
Period length 7 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand four hundred forty-two
- Ordinal
- 129442nd
- Binary
- 11111100110100010
- Octal
- 374642
- Hexadecimal
- 0x1F9A2
- Base64
- Afmi
- One's complement
- 4,294,837,853 (32-bit)
- Scientific notation
- 1.29442 × 10⁵
- As a duration
- 129,442 s = 1 day, 11 hours, 57 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρκθυμβʹ
- Mayan (base 20)
- 𝋰·𝋣·𝋬·𝋢
- Chinese
- 一十二萬九千四百四十二
- Chinese (financial)
- 壹拾貳萬玖仟肆佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129442, here are decompositions:
- 3 + 129439 = 129442
- 23 + 129419 = 129442
- 41 + 129401 = 129442
- 101 + 129341 = 129442
- 149 + 129293 = 129442
- 179 + 129263 = 129442
- 233 + 129209 = 129442
- 353 + 129089 = 129442
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F A6 A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.249.162.
- Address
- 0.1.249.162
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.249.162
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 129,442 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.