The number 24981
24981 is a composite number with 8 divisors. Its prime factorisation is 3 × 11 × 757. Divisors (8): 1, 3, 11, 33, 757, 2271, 8327, 24981.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
24981 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
24981 is composite. Its prime factorisation is
- 3
The divisors add up to 36384; without 24981 itself that is 11403, so 24981 is deficient (11403 is less than 24981). Euler's totient φ(24981) = 15120 numbers up to 24981 share no factor with it.
- 4
The digits of 24981 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 64 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24981 = 3 \times 11 \times 757 \]
24981 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 36384 |
| Euler totient φ(n) | 15120 |
| Square | 624050361 |
| Cube | 15589402068141 |
| Square root | 158.053788 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 64 |
| Scientific notation | 2.4981 × |
24981 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand nine hundred and eighty-one |
| Binary (base 2) | 110000110010101 |
| Octal (base 8) | 60625 |
| Hexadecimal (base 16) | 6195 |
| Base 3 | 1021021020 |
| As time | 24981 seconds = 6 h 56 min 21 s |
Is 24981 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 | Yes (24981 ÷ 3 = 8327) | 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 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (24981 ÷ 11 = 2271) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24981 a prime number?
No. 24981 = 3 × 11 × 757, so it is divisible by 3.
What are the factors of 24981?
1, 3, 11, 33, 757, 2271, 8327, 24981.
What is 24981 in binary?
110000110010101 (hexadecimal 6195, octal 60625).
What is the square root of 24981?
About 158.0538.
Is 24981 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 24981?
It is a composite number with 8 divisors.