121,664
121,664 is a composite number, even.
121,664 (one hundred twenty-one thousand six hundred sixty-four) is an even 6-digit number. It is a composite number with 14 divisors, and factors as 2⁶ × 1,901. Written other ways, in hexadecimal, 0x1DB40.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 288
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 466,121
- Square (n²)
- 14,802,128,896
- Cube (n³)
- 1,800,886,210,002,944
- Divisor count
- 14
- σ(n) — sum of divisors
- 241,554
- φ(n) — Euler's totient
- 60,800
- Sum of prime factors
- 1,913
Primality
Prime factorization: 2 6 × 1901
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,664 = [348; (1, 4, 10, 1, 2, 2, 1, 173, 1, 2, 2, 1, 10, 4, 1, 696)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-one thousand six hundred sixty-four
- Ordinal
- 121664th
- Binary
- 11101101101000000
- Octal
- 355500
- Hexadecimal
- 0x1DB40
- Base64
- AdtA
- One's complement
- 4,294,845,631 (32-bit)
- Scientific notation
- 1.21664 × 10⁵
- As a duration
- 121,664 s = 1 day, 9 hours, 47 minutes, 44 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκαχξδʹ
- Mayan (base 20)
- 𝋯·𝋤·𝋣·𝋤
- Chinese
- 一十二萬一千六百六十四
- Chinese (financial)
- 壹拾貳萬壹仟陸佰陸拾肆
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 121664, here are decompositions:
- 3 + 121661 = 121664
- 31 + 121633 = 121664
- 43 + 121621 = 121664
- 73 + 121591 = 121664
- 157 + 121507 = 121664
- 163 + 121501 = 121664
- 211 + 121453 = 121664
- 223 + 121441 = 121664
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.219.64.
- Address
- 0.1.219.64
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.219.64
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 121,664 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.