121,828
121,828 is a composite number, even.
121,828 (one hundred twenty-one thousand eight hundred twenty-eight) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 7 × 19 × 229. Its proper divisors sum to 135,772, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1DBE4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 256
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 828,121
- Square (n²)
- 14,842,061,584
- Cube (n³)
- 1,808,178,678,655,552
- Divisor count
- 24
- σ(n) — sum of divisors
- 257,600
- φ(n) — Euler's totient
- 49,248
- Sum of prime factors
- 259
Primality
Prime factorization: 2 2 × 7 × 19 × 229
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,828 = [349; (25, 1, 5, 1, 4, 2, 3, 5, 2, 11, 1, 3, 1, 3, 3, 1, 4, 1, 1, 10, 2, 1, 3, 1, …)]
Representations
- In words
- one hundred twenty-one thousand eight hundred twenty-eight
- Ordinal
- 121828th
- Binary
- 11101101111100100
- Octal
- 355744
- Hexadecimal
- 0x1DBE4
- Base64
- Advk
- One's complement
- 4,294,845,467 (32-bit)
- Scientific notation
- 1.21828 × 10⁵
- As a duration
- 121,828 s = 1 day, 9 hours, 50 minutes, 28 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκαωκηʹ
- Mayan (base 20)
- 𝋯·𝋤·𝋫·𝋨
- Chinese
- 一十二萬一千八百二十八
- Chinese (financial)
- 壹拾貳萬壹仟捌佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 121828, here are decompositions:
- 41 + 121787 = 121828
- 101 + 121727 = 121828
- 107 + 121721 = 121828
- 131 + 121697 = 121828
- 167 + 121661 = 121828
- 191 + 121637 = 121828
- 197 + 121631 = 121828
- 251 + 121577 = 121828
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.219.228.
- Address
- 0.1.219.228
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.219.228
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 121,828 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.