129,749
129,749 is a prime, odd.
129,749 (one hundred twenty-nine thousand seven hundred forty-nine) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1FAD5.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 32
- Digit product
- 4,536
- Digital root
- 5
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 947,921
- Recamán's sequence
- a(497,005) = 129,749
- Square (n²)
- 16,834,803,001
- Cube (n³)
- 2,184,298,854,576,749
- Divisor count
- 2
- σ(n) — sum of divisors
- 129,750
- φ(n) — Euler's totient
- 129,748
Primality
129,749 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,749 = [360; (4, 1, 5, 102, 1, 2, 1, 9, 2, 1, 1, 14, 9, 2, 2, 3, 2, 1, 2, 1, 1, 2, 1, 2, …)]
Period length 41 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand seven hundred forty-nine
- Ordinal
- 129749th
- Binary
- 11111101011010101
- Octal
- 375325
- Hexadecimal
- 0x1FAD5
- Base64
- AfrV
- One's complement
- 4,294,837,546 (32-bit)
- Scientific notation
- 1.29749 × 10⁵
- As a duration
- 129,749 s = 1 day, 12 hours, 2 minutes, 29 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκθψμθʹ
- Mayan (base 20)
- 𝋰·𝋤·𝋧·𝋩
- Chinese
- 一十二萬九千七百四十九
- Chinese (financial)
- 壹拾貳萬玖仟柒佰肆拾玖
Also seen as
UTF-8 encoding: F0 9F AB 95 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.250.213.
- Address
- 0.1.250.213
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.250.213
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 129,749 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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.