The number 82442
82442 is a composite number with 4 divisors. Its prime factorisation is 2 × 41221. Divisors (4): 1, 2, 41221, 82442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 82442: a semiprime: 2 × 41221, the product of two primes.
- 2
82442 is composite. Its prime factorisation is
- 3
The divisors add up to 123666; without 82442 itself that is 41224, so 82442 is deficient (41224 is less than 82442). Euler's totient φ(82442) = 41220 numbers up to 82442 share no factor with it.
- 4
The digits of 82442 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 151 steps to reach 1.
LaTeX source of the formulas on this page
\[ 82442 = 2 \times 41221 \]
82442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 123666 |
| Euler totient φ(n) | 41220 |
| Square | 6796683364 |
| Cube | 560332169894888 |
| Square root | 287.127150 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 151 |
| Scientific notation | 8.2442 × |
82442 in other forms
| Form | Value |
|---|---|
| In words | eighty-two thousand four hundred and forty-two |
| Binary (base 2) | 10100001000001010 |
| Octal (base 8) | 241012 |
| Hexadecimal (base 16) | 1420A |
| Base 3 | 11012002102 |
| As time | 82442 seconds = 22 h 54 min 2 s |
Is 82442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (82442 ÷ 2 = 41221) | 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 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 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 8) | 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 82442 a prime number?
No. 82442 = 2 × 41221, so it is divisible by 2.
What are the factors of 82442?
1, 2, 41221, 82442.
What is 82442 in binary?
10100001000001010 (hexadecimal 1420A, octal 241012).
What is the square root of 82442?
About 287.1271.
Is 82442 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 82442?
82442 is a semiprime: 2 × 41221, the product of two primes.