The number 24995
24995 is a composite number with 4 divisors. Its prime factorisation is 5 × 4999. Divisors (4): 1, 5, 4999, 24995.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 24995: a semiprime: 5 × 4999, the product of two primes.
- 2
24995 is composite. Its prime factorisation is
- 3
The divisors add up to 30000; without 24995 itself that is 5005, so 24995 is deficient (5005 is less than 24995). Euler's totient φ(24995) = 19992 numbers up to 24995 share no factor with it.
- 4
The digits of 24995 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 157 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24995 = 5 \times 4999 \]
24995 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 30000 |
| Euler totient φ(n) | 19992 |
| Square | 624750025 |
| Cube | 15615626874875 |
| Square root | 158.098071 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 157 |
| Scientific notation | 2.4995 × |
24995 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand nine hundred and ninety-five |
| Binary (base 2) | 110000110100011 |
| Octal (base 8) | 60643 |
| Hexadecimal (base 16) | 61A3 |
| Base 3 | 1021021202 |
| As time | 24995 seconds = 6 h 56 min 35 s |
Is 24995 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 (24995 ÷ 5 = 4999) | 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 2) | 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 3) | 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 24995 a prime number?
No. 24995 = 5 × 4999, so it is divisible by 5.
What are the factors of 24995?
1, 5, 4999, 24995.
What is 24995 in binary?
110000110100011 (hexadecimal 61A3, octal 60643).
What is the square root of 24995?
About 158.0981.
Is 24995 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 24995?
24995 is a semiprime: 5 × 4999, the product of two primes.