129,001
129,001 is a prime, odd.
129,001 (one hundred twenty-nine thousand one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1F7E9.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 100,921
- Recamán's sequence
- a(231,638) = 129,001
- Square (n²)
- 16,641,258,001
- Cube (n³)
- 2,146,738,923,387,001
- Divisor count
- 2
- σ(n) — sum of divisors
- 129,002
- φ(n) — Euler's totient
- 129,000
Primality
129,001 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,001 = [359; (5, 1, 64, 2, 7, 1, 3, 5, 1, 2, 8, 1, 1, 1, 2, 7, 9, 2, 3, 1, 4, 1, 3, 1, …)]
Representations
- In words
- one hundred twenty-nine thousand one
- Ordinal
- 129001st
- Binary
- 11111011111101001
- Octal
- 373751
- Hexadecimal
- 0x1F7E9
- Base64
- Affp
- One's complement
- 4,294,838,294 (32-bit)
- Scientific notation
- 1.29001 × 10⁵
- As a duration
- 129,001 s = 1 day, 11 hours, 50 minutes, 1 second
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺
- Greek (Milesian)
- ͵ρκθαʹ
- Mayan (base 20)
- 𝋰·𝋢·𝋪·𝋡
- Chinese
- 一十二萬九千零一
- Chinese (financial)
- 壹拾貳萬玖仟零壹
Also seen as
UTF-8 encoding: F0 9F 9F A9 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.247.233.
- Address
- 0.1.247.233
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.247.233
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 129,001 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 129001 first appears in π at position 11,191 of the decimal expansion (the 11,191ordinal-suffix:st 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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.