129,000
129,000 is a composite number, even.
129,000 (one hundred twenty-nine thousand) is an even 6-digit number. It is a composite number with 64 divisors, and factors as 2³ × 3 × 5³ × 43. Its proper divisors sum to 282,840, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1F7E8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 921
- Recamán's sequence
- a(231,640) = 129,000
- Square (n²)
- 16,641,000,000
- Cube (n³)
- 2,146,689,000,000,000
- Divisor count
- 64
- σ(n) — sum of divisors
- 411,840
- φ(n) — Euler's totient
- 33,600
- Sum of prime factors
- 67
Primality
Prime factorization: 2 3 × 3 × 5 3 × 43
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,000 = [359; (6, 28, 1, 1, 3, 3, 1, 27, 1, 28, 1, 27, 1, 3, 3, 1, 1, 28, 6, 718)]
Period length 20 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand
- Ordinal
- 129000th
- Binary
- 11111011111101000
- Octal
- 373750
- Hexadecimal
- 0x1F7E8
- Base64
- Affo
- One's complement
- 4,294,838,295 (32-bit)
- Scientific notation
- 1.29 × 10⁵
- As a duration
- 129,000 s = 1 day, 11 hours, 50 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 ·
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼
- Greek (Milesian)
- ͵ρκθ
- Mayan (base 20)
- 𝋰·𝋢·𝋪·𝋠
- Chinese
- 一十二萬九千
- Chinese (financial)
- 壹拾貳萬玖仟
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129000, here are decompositions:
- 7 + 128993 = 129000
- 13 + 128987 = 129000
- 17 + 128983 = 129000
- 19 + 128981 = 129000
- 29 + 128971 = 129000
- 31 + 128969 = 129000
- 41 + 128959 = 129000
- 59 + 128941 = 129000
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F 9F A8 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.247.232.
- Address
- 0.1.247.232
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.247.232
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 129,000 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 129000 first appears in π at position 292,705 of the decimal expansion (the 292,705ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.