The number 25007
25007 is a composite number with 4 divisors. Its prime factorisation is 17 × 1471. Divisors (4): 1, 17, 1471, 25007.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 25007: a semiprime: 17 × 1471, the product of two primes.
- 2
25007 is composite. Its prime factorisation is
- 3
The divisors add up to 26496; without 25007 itself that is 1489, so 25007 is deficient (1489 is less than 25007). Euler's totient φ(25007) = 23520 numbers up to 25007 share no factor with it.
- 4
The digits of 25007 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 157 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25007 = 17 \times 1471 \]
25007 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 26496 |
| Euler totient φ(n) | 23520 |
| Square | 625350049 |
| Cube | 15638128675343 |
| Square root | 158.136017 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 157 |
| Scientific notation | 2.5007 × |
25007 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand and seven |
| Binary (base 2) | 110000110101111 |
| Octal (base 8) | 60657 |
| Hexadecimal (base 16) | 61AF |
| Base 3 | 1021022012 |
| As time | 25007 seconds = 6 h 56 min 47 s |
Is 25007 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 | No (remainder 2) | 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 3) | 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 7) | 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 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | 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 25007 a prime number?
No. 25007 = 17 × 1471, so it is divisible by 17.
What are the factors of 25007?
1, 17, 1471, 25007.
What is 25007 in binary?
110000110101111 (hexadecimal 61AF, octal 60657).
What is the square root of 25007?
About 158.1360.
Is 25007 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 25007?
25007 is a semiprime: 17 × 1471, the product of two primes.