126,990
126,990 is a composite number, even.
126,990 (one hundred twenty-six thousand nine hundred ninety) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2 × 3² × 5 × 17 × 83. Its proper divisors sum to 226,818, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1F00E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 27
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 99,621
- Recamán's sequence
- a(499,387) = 126,990
- Square (n²)
- 16,126,460,100
- Cube (n³)
- 2,047,899,168,099,000
- Divisor count
- 48
- σ(n) — sum of divisors
- 353,808
- φ(n) — Euler's totient
- 31,488
- Sum of prime factors
- 113
Primality
Prime factorization: 2 × 3 2 × 5 × 17 × 83
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√126,990 = [356; (2, 1, 4, 8, 1, 1, 2, 2, 4, 1, 6, 4, 6, 1, 4, 2, 2, 1, 1, 8, 4, 1, 2, 712)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-six thousand nine hundred ninety
- Ordinal
- 126990th
- Binary
- 11111000000001110
- Octal
- 370016
- Hexadecimal
- 0x1F00E
- Base64
- AfAO
- One's complement
- 4,294,840,305 (32-bit)
- Scientific notation
- 1.2699 × 10⁵
- As a duration
- 126,990 s = 1 day, 11 hours, 16 minutes, 30 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρκϛϡϟʹ
- Mayan (base 20)
- 𝋯·𝋱·𝋩·𝋪
- Chinese
- 一十二萬六千九百九十
- Chinese (financial)
- 壹拾貳萬陸仟玖佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 126990, here are decompositions:
- 23 + 126967 = 126990
- 29 + 126961 = 126990
- 41 + 126949 = 126990
- 47 + 126943 = 126990
- 67 + 126923 = 126990
- 131 + 126859 = 126990
- 139 + 126851 = 126990
- 151 + 126839 = 126990
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F 80 8E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.240.14.
- Address
- 0.1.240.14
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.240.14
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 126,990 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.