The number 24842
24842 is a palindrome: it reads 24842 backwards too. Its prime factorisation is 2 × 12421. Divisors (4): 1, 2, 12421, 24842.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 24842: a palindrome: it reads 24842 backwards too; a semiprime: 2 × 12421, the product of two primes.
- 2
24842 is composite. Its prime factorisation is
- 3
The divisors add up to 37266; without 24842 itself that is 12424, so 24842 is deficient (12424 is less than 24842). Euler's totient φ(24842) = 12420 numbers up to 24842 share no factor with it.
- 4
The digits of 24842 add up to 20, 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
\[ 24842 = 2 \times 12421 \]
24842 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 37266 |
| Euler totient φ(n) | 12420 |
| Square | 617124964 |
| Cube | 15330618355688 |
| Square root | 157.613451 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 157 |
| Scientific notation | 2.4842 × |
24842 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand eight hundred and forty-two |
| Binary (base 2) | 110000100001010 |
| Octal (base 8) | 60412 |
| Hexadecimal (base 16) | 610A |
| Base 3 | 1021002002 |
| As time | 24842 seconds = 6 h 54 min 2 s |
Is 24842 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (24842 ÷ 2 = 12421) | 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 2) | 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 2) | 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 2) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24842 a prime number?
No. 24842 = 2 × 12421, so it is divisible by 2.
What are the factors of 24842?
1, 2, 12421, 24842.
What is 24842 in binary?
110000100001010 (hexadecimal 610A, octal 60412).
What is the square root of 24842?
About 157.6135.
Is 24842 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 24842?
24842 is a palindrome: it reads 24842 backwards too; a semiprime: 2 × 12421, the product of two primes.