121,428
121,428 is a composite number, even.
121,428 (one hundred twenty-one thousand four hundred twenty-eight) is an even 6-digit number. It is a composite number with 18 divisors, and factors as 2² × 3² × 3,373. Its proper divisors sum to 185,606, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1DA54.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 128
- Digital root
- 9
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 824,121
- Square (n²)
- 14,744,759,184
- Cube (n³)
- 1,790,426,618,194,752
- Divisor count
- 18
- σ(n) — sum of divisors
- 307,034
- φ(n) — Euler's totient
- 40,464
- Sum of prime factors
- 3,383
Primality
Prime factorization: 2 2 × 3 2 × 3373
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,428 = [348; (2, 6, 1, 2, 5, 1, 1, 1, 14, 5, 1, 1, 4, 3, 2, 1, 1, 3, 1, 5, 1, 2, 25, 2, …)]
Representations
- In words
- one hundred twenty-one thousand four hundred twenty-eight
- Ordinal
- 121428th
- Binary
- 11101101001010100
- Octal
- 355124
- Hexadecimal
- 0x1DA54
- Base64
- AdpU
- One's complement
- 4,294,845,867 (32-bit)
- Scientific notation
- 1.21428 × 10⁵
- As a duration
- 121,428 s = 1 day, 9 hours, 43 minutes, 48 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκαυκηʹ
- Mayan (base 20)
- 𝋯·𝋣·𝋫·𝋨
- Chinese
- 一十二萬一千四百二十八
- Chinese (financial)
- 壹拾貳萬壹仟肆佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 121428, here are decompositions:
- 7 + 121421 = 121428
- 59 + 121369 = 121428
- 61 + 121367 = 121428
- 71 + 121357 = 121428
- 79 + 121349 = 121428
- 101 + 121327 = 121428
- 107 + 121321 = 121428
- 137 + 121291 = 121428
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9D A9 94 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.218.84.
- Address
- 0.1.218.84
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.218.84
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 121,428 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 121428 first appears in π at position 281,514 of the decimal expansion (the 281,514ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.