121,904
121,904 is a composite number, even.
121,904 (one hundred twenty-one thousand nine hundred four) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 19 × 401. Its proper divisors sum to 127,336, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1DC30.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 409,121
- Square (n²)
- 14,860,585,216
- Cube (n³)
- 1,811,564,780,171,264
- Divisor count
- 20
- σ(n) — sum of divisors
- 249,240
- φ(n) — Euler's totient
- 57,600
- Sum of prime factors
- 428
Primality
Prime factorization: 2 4 × 19 × 401
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,904 = [349; (6, 1, 3, 1, 1, 34, 2, 1, 3, 1, 21, 27, 1, 7, 1, 3, 4, 9, 3, 43, 3, 9, 4, 3, …)]
Period length 40 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-one thousand nine hundred four
- Ordinal
- 121904th
- Binary
- 11101110000110000
- Octal
- 356060
- Hexadecimal
- 0x1DC30
- Base64
- Adww
- One's complement
- 4,294,845,391 (32-bit)
- Scientific notation
- 1.21904 × 10⁵
- As a duration
- 121,904 s = 1 day, 9 hours, 51 minutes, 44 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκαϡδʹ
- Mayan (base 20)
- 𝋯·𝋤·𝋯·𝋤
- Chinese
- 一十二萬一千九百零四
- Chinese (financial)
- 壹拾貳萬壹仟玖佰零肆
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 121904, here are decompositions:
- 37 + 121867 = 121904
- 61 + 121843 = 121904
- 193 + 121711 = 121904
- 271 + 121633 = 121904
- 283 + 121621 = 121904
- 313 + 121591 = 121904
- 373 + 121531 = 121904
- 397 + 121507 = 121904
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.220.48.
- Address
- 0.1.220.48
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.220.48
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 121,904 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.