125,840
125,840 is a composite number, even.
125,840 (one hundred twenty-five thousand eight hundred forty) is an even 6-digit number. It is a composite number with 60 divisors, and factors as 2⁴ × 5 × 11² × 13. Its proper divisors sum to 220,492, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1EB90.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 48,521
- Recamán's sequence
- a(234,484) = 125,840
- Square (n²)
- 15,835,705,600
- Cube (n³)
- 1,992,765,192,704,000
- Divisor count
- 60
- σ(n) — sum of divisors
- 346,332
- φ(n) — Euler's totient
- 42,240
- Sum of prime factors
- 48
Primality
Prime factorization: 2 4 × 5 × 11 2 × 13
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√125,840 = [354; (1, 2, 1, 5, 8, 1, 4, 5, 1, 1, 1, 13, 1, 4, 1, 13, 1, 1, 1, 5, 4, 1, 8, 5, …)]
Period length 28 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-five thousand eight hundred forty
- Ordinal
- 125840th
- Binary
- 11110101110010000
- Octal
- 365620
- Hexadecimal
- 0x1EB90
- Base64
- AeuQ
- One's complement
- 4,294,841,455 (32-bit)
- Scientific notation
- 1.2584 × 10⁵
- As a duration
- 125,840 s = 1 day, 10 hours, 57 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρκεωμʹ
- Mayan (base 20)
- 𝋯·𝋮·𝋬·𝋠
- Chinese
- 一十二萬五千八百四十
- Chinese (financial)
- 壹拾貳萬伍仟捌佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 125840, here are decompositions:
- 19 + 125821 = 125840
- 37 + 125803 = 125840
- 97 + 125743 = 125840
- 103 + 125737 = 125840
- 109 + 125731 = 125840
- 157 + 125683 = 125840
- 181 + 125659 = 125840
- 199 + 125641 = 125840
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.235.144.
- Address
- 0.1.235.144
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.235.144
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 125,840 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 125840 first appears in π at position 201,515 of the decimal expansion (the 201,515ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.