The number 9725
9725 is a composite number with 6 divisors. Its prime factorisation is Ć 389. Divisors (6): 1, 5, 25, 389, 1945, 9725.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
9725 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
9725 is composite. Its prime factorisation is
- 3
The divisors add up to 12090; without 9725 itself that is 2365, so 9725 is deficient (2365 is less than 9725). Euler's totient Ļ(9725) = 7760 numbers up to 9725 share no factor with it.
- 4
The digits of 9725 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 166 steps to reach 1.
LaTeX source of the formulas on this page
\[ 9725 = 5^{2} \times 389 \]9725 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 12090 |
| Euler totient Ļ(n) | 7760 |
| Square | 94575625 |
| Cube | 919747953125 |
| Square root | 98.615415 (= 5ā389) |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 166 |
| Scientific notation | 9.725 Ć |
9725 in other forms
| Form | Value |
|---|---|
| In words | nine thousand seven hundred and twenty-five |
| Binary (base 2) | 10010111111101 |
| Octal (base 8) | 22775 |
| Hexadecimal (base 16) | 25FD |
| Base 3 | 111100012 |
| As time | 9725 seconds = 2 h 42 min 5 s |
Is 9725 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (9725 Ć· 5 = 1945) | 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 2) | 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 5) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 9725 a prime number?
No. 9725 = Ć 389, so it is divisible by 5.
What are the factors of 9725?
1, 5, 25, 389, 1945, 9725.
What is 9725 in binary?
10010111111101 (hexadecimal 25FD, octal 22775).
What is the square root of 9725?
About 98.6154, exactly 5ā389.
Is 9725 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 9725?
It is a composite number with 6 divisors.