128,001
128,001 is a composite number, odd.
128,001 (one hundred twenty-eight thousand one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 3 × 42,667. Written other ways, in hexadecimal, 0x1F401.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 100,821
- Square (n²)
- 16,384,256,001
- Cube (n³)
- 2,097,201,152,384,001
- Divisor count
- 4
- σ(n) — sum of divisors
- 170,672
- φ(n) — Euler's totient
- 85,332
- Sum of prime factors
- 42,670
Primality
Prime factorization: 3 × 42667
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√128,001 = [357; (1, 3, 2, 1, 1, 3, 1, 29, 31, 12, 1, 43, 1, 3, 1, 22, 3, 1, 1, 6, 1, 7, 1, 1, …)]
Representations
- In words
- one hundred twenty-eight thousand one
- Ordinal
- 128001st
- Binary
- 11111010000000001
- Octal
- 372001
- Hexadecimal
- 0x1F401
- Base64
- AfQB
- One's complement
- 4,294,839,294 (32-bit)
- Scientific notation
- 1.28001 × 10⁵
- As a duration
- 128,001 s = 1 day, 11 hours, 33 minutes, 21 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺
- Greek (Milesian)
- ͵ρκηαʹ
- Mayan (base 20)
- 𝋰·𝋠·𝋠·𝋡
- Chinese
- 一十二萬八千零一
- Chinese (financial)
- 壹拾貳萬捌仟零壹
Also seen as
UTF-8 encoding: F0 9F 90 81 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.244.1.
- Address
- 0.1.244.1
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.244.1
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 128,001 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 128001 first appears in π at position 64,244 of the decimal expansion (the 64,244ordinal-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°.