129,742
129,742 is a composite number, even.
129,742 (one hundred twenty-nine thousand seven hundred forty-two) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 64,871. Written other ways, in hexadecimal, 0x1FACE.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 1,008
- Digital root
- 7
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 247,921
- Recamán's sequence
- a(497,019) = 129,742
- Square (n²)
- 16,832,986,564
- Cube (n³)
- 2,183,945,342,786,488
- Divisor count
- 4
- σ(n) — sum of divisors
- 194,616
- φ(n) — Euler's totient
- 64,870
- Sum of prime factors
- 64,873
Primality
Prime factorization: 2 × 64871
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,742 = [360; (5, 13, 1, 12, 2, 2, 3, 4, 1, 1, 1, 1, 5, 3, 2, 1, 2, 3, 22, 1, 16, 5, 8, 12, …)]
Representations
- In words
- one hundred twenty-nine thousand seven hundred forty-two
- Ordinal
- 129742nd
- Binary
- 11111101011001110
- Octal
- 375316
- Hexadecimal
- 0x1FACE
- Base64
- AfrO
- One's complement
- 4,294,837,553 (32-bit)
- Scientific notation
- 1.29742 × 10⁵
- As a duration
- 129,742 s = 1 day, 12 hours, 2 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρκθψμβʹ
- Mayan (base 20)
- 𝋰·𝋤·𝋧·𝋢
- Chinese
- 一十二萬九千七百四十二
- Chinese (financial)
- 壹拾貳萬玖仟柒佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129742, here are decompositions:
- 5 + 129737 = 129742
- 23 + 129719 = 129742
- 71 + 129671 = 129742
- 101 + 129641 = 129742
- 113 + 129629 = 129742
- 149 + 129593 = 129742
- 233 + 129509 = 129742
- 251 + 129491 = 129742
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F AB 8E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.250.206.
- Address
- 0.1.250.206
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.250.206
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 129,742 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 129742 first appears in π at position 14,264 of the decimal expansion (the 14,264ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.