121,997
121,997 is a prime, odd.
121,997 (one hundred twenty-one thousand nine hundred ninety-seven) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1DC8D.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 29
- Digit product
- 1,134
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 799,121
- Square (n²)
- 14,883,268,009
- Cube (n³)
- 1,815,714,047,293,973
- Divisor count
- 2
- σ(n) — sum of divisors
- 121,998
- φ(n) — Euler's totient
- 121,996
Primality
121,997 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,997 = [349; (3, 1, 1, 3, 2, 24, 1, 1, 24, 2, 3, 1, 1, 3, 698)]
Period length 15 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-one thousand nine hundred ninety-seven
- Ordinal
- 121997th
- Binary
- 11101110010001101
- Octal
- 356215
- Hexadecimal
- 0x1DC8D
- Base64
- AdyN
- One's complement
- 4,294,845,298 (32-bit)
- Scientific notation
- 1.21997 × 10⁵
- As a duration
- 121,997 s = 1 day, 9 hours, 53 minutes, 17 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκαϡϟζʹ
- Mayan (base 20)
- 𝋯·𝋤·𝋳·𝋱
- Chinese
- 一十二萬一千九百九十七
- Chinese (financial)
- 壹拾貳萬壹仟玖佰玖拾柒
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.1.220.141.
- Address
- 0.1.220.141
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.220.141
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 121,997 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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.