981,120
981,120 is a composite number, even.
981,120 (nine hundred eighty-one thousand one hundred twenty) is an even 6-digit number. It is a composite number with 128 divisors, and factors as 2⁷ × 3 × 5 × 7 × 73. Its proper divisors sum to 2,641,920, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xEF880.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 21,189
- Recamán's sequence
- a(324,171) = 981,120
- Square (n²)
- 962,596,454,400
- Cube (n³)
- 944,422,633,340,928,000
- Divisor count
- 128
- σ(n) — sum of divisors
- 3,623,040
- φ(n) — Euler's totient
- 221,184
- Sum of prime factors
- 102
Primality
Prime factorization: 2 7 × 3 × 5 × 7 × 73
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√981,120 = [990; (1, 1, 16, 6, 1, 3, 1, 6, 16, 1, 1, 1980)]
Period length 12 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred eighty-one thousand one hundred twenty
- Ordinal
- 981120th
- Binary
- 11101111100010000000
- Octal
- 3574200
- Hexadecimal
- 0xEF880
- Base64
- DviA
- One's complement
- 4,293,986,175 (32-bit)
- Scientific notation
- 9.8112 × 10⁵
- As a duration
- 981,120 s = 11 days, 8 hours, 32 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓎆𓎆
- Greek (Milesian)
- ͵ϡπαρκʹ
- Chinese
- 九十八萬一千一百二十
- Chinese (financial)
- 玖拾捌萬壹仟壹佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 981120, here are decompositions:
- 29 + 981091 = 981120
- 43 + 981077 = 981120
- 47 + 981073 = 981120
- 53 + 981067 = 981120
- 59 + 981061 = 981120
- 71 + 981049 = 981120
- 83 + 981037 = 981120
- 97 + 981023 = 981120
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.14.248.128.
- Address
- 0.14.248.128
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.14.248.128
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 981,120 and was likely granted around 1910.
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°.