128,002
128,002 is a composite number, even.
128,002 (one hundred twenty-eight thousand two) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 7 × 41 × 223. Written other ways, in hexadecimal, 0x1F402.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 200,821
- Square (n²)
- 16,384,512,004
- Cube (n³)
- 2,097,250,305,536,008
- Divisor count
- 16
- σ(n) — sum of divisors
- 225,792
- φ(n) — Euler's totient
- 53,280
- Sum of prime factors
- 273
Primality
Prime factorization: 2 × 7 × 41 × 223
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√128,002 = [357; (1, 3, 2, 2, 1, 1, 3, 1, 1, 8, 1, 1, 1, 1, 2, 1, 1, 1, 1, 8, 1, 1, 3, 1, …)]
Period length 30 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-eight thousand two
- Ordinal
- 128002nd
- Binary
- 11111010000000010
- Octal
- 372002
- Hexadecimal
- 0x1F402
- Base64
- AfQC
- One's complement
- 4,294,839,293 (32-bit)
- Scientific notation
- 1.28002 × 10⁵
- As a duration
- 128,002 s = 1 day, 11 hours, 33 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺
- Greek (Milesian)
- ͵ρκηβʹ
- Mayan (base 20)
- 𝋰·𝋠·𝋠·𝋢
- Chinese
- 一十二萬八千零二
- Chinese (financial)
- 壹拾貳萬捌仟零貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 128002, here are decompositions:
- 5 + 127997 = 128002
- 23 + 127979 = 128002
- 29 + 127973 = 128002
- 71 + 127931 = 128002
- 89 + 127913 = 128002
- 239 + 127763 = 128002
- 263 + 127739 = 128002
- 269 + 127733 = 128002
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F 90 82 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.244.2.
- Address
- 0.1.244.2
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.244.2
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 128,002 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.