The number 25835
25835 is a composite number with 4 divisors. Its prime factorisation is 5 × 5167. Divisors (4): 1, 5, 5167, 25835.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 25835: a semiprime: 5 × 5167, the product of two primes.
- 2
25835 is composite. Its prime factorisation is
- 3
The divisors add up to 31008; without 25835 itself that is 5173, so 25835 is deficient (5173 is less than 25835). Euler's totient φ(25835) = 20664 numbers up to 25835 share no factor with it.
- 4
The digits of 25835 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 126 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25835 = 5 \times 5167 \]
25835 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31008 |
| Euler totient φ(n) | 20664 |
| Square | 667447225 |
| Cube | 17243499057875 |
| Square root | 160.732697 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 126 |
| Scientific notation | 2.5835 × |
25835 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand eight hundred and thirty-five |
| Binary (base 2) | 110010011101011 |
| Octal (base 8) | 62353 |
| Hexadecimal (base 16) | 64EB |
| Base 3 | 1022102212 |
| As time | 25835 seconds = 7 h 10 min 35 s |
Is 25835 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (25835 ÷ 5 = 5167) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25835 a prime number?
No. 25835 = 5 × 5167, so it is divisible by 5.
What are the factors of 25835?
1, 5, 5167, 25835.
What is 25835 in binary?
110010011101011 (hexadecimal 64EB, octal 62353).
What is the square root of 25835?
About 160.7327.
Is 25835 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 25835?
25835 is a semiprime: 5 × 5167, the product of two primes.