121,790
121,790 is a composite number, even.
121,790 (one hundred twenty-one thousand seven hundred ninety) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 5 × 19 × 641. Written other ways, in hexadecimal, 0x1DBBE.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 97,121
- Square (n²)
- 14,832,804,100
- Cube (n³)
- 1,806,487,211,339,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 231,120
- φ(n) — Euler's totient
- 46,080
- Sum of prime factors
- 667
Primality
Prime factorization: 2 × 5 × 19 × 641
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,790 = [348; (1, 62, 2, 4, 1, 4, 1, 19, 8, 1, 3, 1, 1, 1, 3, 1, 49, 14, 4, 2, 5, 1, 8, 1, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-one thousand seven hundred ninety
- Ordinal
- 121790th
- Binary
- 11101101110111110
- Octal
- 355676
- Hexadecimal
- 0x1DBBE
- Base64
- Adu+
- One's complement
- 4,294,845,505 (32-bit)
- Scientific notation
- 1.2179 × 10⁵
- As a duration
- 121,790 s = 1 day, 9 hours, 49 minutes, 50 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρκαψϟʹ
- Mayan (base 20)
- 𝋯·𝋤·𝋩·𝋪
- Chinese
- 一十二萬一千七百九十
- Chinese (financial)
- 壹拾貳萬壹仟柒佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 121790, here are decompositions:
- 3 + 121787 = 121790
- 79 + 121711 = 121790
- 103 + 121687 = 121790
- 157 + 121633 = 121790
- 181 + 121609 = 121790
- 199 + 121591 = 121790
- 211 + 121579 = 121790
- 283 + 121507 = 121790
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.219.190.
- Address
- 0.1.219.190
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.219.190
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 121,790 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.