The number 12442
12442 is a composite number with 4 divisors. Its prime factorisation is 2 × 6221. Divisors (4): 1, 2, 6221, 12442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 12442: a semiprime: 2 × 6221, the product of two primes.
- 2
12442 is composite. Its prime factorisation is
- 3
The divisors add up to 18666; without 12442 itself that is 6224, so 12442 is deficient (6224 is less than 12442). Euler's totient φ(12442) = 6220 numbers up to 12442 share no factor with it.
- 4
The digits of 12442 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 37 steps to reach 1.
LaTeX source of the formulas on this page
\[ 12442 = 2 \times 6221 \]
12442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 18666 |
| Euler totient φ(n) | 6220 |
| Square | 154803364 |
| Cube | 1926063454888 |
| Square root | 111.543713 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 37 |
| Scientific notation | 1.2442 × |
12442 in other forms
| Form | Value |
|---|---|
| In words | twelve thousand four hundred and forty-two |
| Binary (base 2) | 11000010011010 |
| Octal (base 8) | 30232 |
| Hexadecimal (base 16) | 309A |
| Base 3 | 122001211 |
| As time | 12442 seconds = 3 h 27 min 22 s |
Is 12442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (12442 ÷ 2 = 6221) | 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 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 4) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 12442 a prime number?
No. 12442 = 2 × 6221, so it is divisible by 2.
What are the factors of 12442?
1, 2, 6221, 12442.
What is 12442 in binary?
11000010011010 (hexadecimal 309A, octal 30232).
What is the square root of 12442?
About 111.5437.
Is 12442 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 12442?
12442 is a semiprime: 2 × 6221, the product of two primes.