128,042
128,042 is a composite number, even.
128,042 (one hundred twenty-eight thousand forty-two) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 73 × 877. Written other ways, in hexadecimal, 0x1F42A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 240,821
- Square (n²)
- 16,394,753,764
- Cube (n³)
- 2,099,217,061,450,088
- Divisor count
- 8
- σ(n) — sum of divisors
- 194,916
- φ(n) — Euler's totient
- 63,072
- Sum of prime factors
- 952
Primality
Prime factorization: 2 × 73 × 877
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√128,042 = [357; (1, 4, 1, 6, 1, 1, 5, 9, 1, 8, 1, 9, 5, 1, 1, 6, 1, 4, 1, 714)]
Period length 20 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-eight thousand forty-two
- Ordinal
- 128042nd
- Binary
- 11111010000101010
- Octal
- 372052
- Hexadecimal
- 0x1F42A
- Base64
- AfQq
- One's complement
- 4,294,839,253 (32-bit)
- Scientific notation
- 1.28042 × 10⁵
- As a duration
- 128,042 s = 1 day, 11 hours, 34 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρκημβʹ
- Mayan (base 20)
- 𝋰·𝋠·𝋢·𝋢
- Chinese
- 一十二萬八千零四十二
- Chinese (financial)
- 壹拾貳萬捌仟零肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 128042, here are decompositions:
- 193 + 127849 = 128042
- 199 + 127843 = 128042
- 223 + 127819 = 128042
- 331 + 127711 = 128042
- 373 + 127669 = 128042
- 379 + 127663 = 128042
- 433 + 127609 = 128042
- 463 + 127579 = 128042
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F 90 AA (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.244.42.
- Address
- 0.1.244.42
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.244.42
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 128,042 and was likely granted around 1872.
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.