125,921
125,921 is a prime, odd.
125,921 (one hundred twenty-five thousand nine hundred twenty-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1EBE1.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 180
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 129,521
- Recamán's sequence
- a(234,322) = 125,921
- Square (n²)
- 15,856,098,241
- Cube (n³)
- 1,996,615,746,604,961
- Divisor count
- 2
- σ(n) — sum of divisors
- 125,922
- φ(n) — Euler's totient
- 125,920
Primality
125,921 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√125,921 = [354; (1, 5, 1, 4, 1, 2, 1, 2, 1, 1, 3, 1, 1, 9, 2, 3, 3, 8, 22, 17, 3, 1, 3, 2, …)]
Representations
- In words
- one hundred twenty-five thousand nine hundred twenty-one
- Ordinal
- 125921st
- Binary
- 11110101111100001
- Octal
- 365741
- Hexadecimal
- 0x1EBE1
- Base64
- Aevh
- One's complement
- 4,294,841,374 (32-bit)
- Scientific notation
- 1.25921 × 10⁵
- As a duration
- 125,921 s = 1 day, 10 hours, 58 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρκεϡκαʹ
- Mayan (base 20)
- 𝋯·𝋮·𝋰·𝋡
- Chinese
- 一十二萬五千九百二十一
- Chinese (financial)
- 壹拾貳萬伍仟玖佰貳拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.1.235.225.
- Address
- 0.1.235.225
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.235.225
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 125,921 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.