The number 24997
24997 is a composite number with 4 divisors. Its prime factorisation is 7 × 3571. Divisors (4): 1, 7, 3571, 24997.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 24997: a semiprime: 7 × 3571, the product of two primes.
- 2
24997 is composite. Its prime factorisation is
- 3
The divisors add up to 28576; without 24997 itself that is 3579, so 24997 is deficient (3579 is less than 24997). Euler's totient φ(24997) = 21420 numbers up to 24997 share no factor with it.
- 4
The digits of 24997 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 157 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24997 = 7 \times 3571 \]
24997 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 28576 |
| Euler totient φ(n) | 21420 |
| Square | 624850009 |
| Cube | 15619375674973 |
| Square root | 158.104396 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 157 |
| Scientific notation | 2.4997 × |
24997 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand nine hundred and ninety-seven |
| Binary (base 2) | 110000110100101 |
| Octal (base 8) | 60645 |
| Hexadecimal (base 16) | 61A5 |
| Base 3 | 1021021211 |
| As time | 24997 seconds = 6 h 56 min 37 s |
Is 24997 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 1) | 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 | No (remainder 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (24997 ÷ 7 = 3571) | 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 4) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24997 a prime number?
No. 24997 = 7 × 3571, so it is divisible by 7.
What are the factors of 24997?
1, 7, 3571, 24997.
What is 24997 in binary?
110000110100101 (hexadecimal 61A5, octal 60645).
What is the square root of 24997?
About 158.1044.
Is 24997 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 24997?
24997 is a semiprime: 7 × 3571, the product of two primes.