The number 42422
42422 is a composite number with 4 divisors. Its prime factorisation is 2 × 21211. Divisors (4): 1, 2, 21211, 42422.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42422: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 21211, the product of two primes.
- 2
42422 is composite. Its prime factorisation is
- 3
The divisors add up to 63636; without 42422 itself that is 21214, so 42422 is deficient (21214 is less than 42422). Euler's totient φ(42422) = 21210 numbers up to 42422 share no factor with it.
- 4
The digits of 42422 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 225 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42422 = 2 \times 21211 \]
42422 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63636 |
| Euler totient φ(n) | 21210 |
| Square | 1799626084 |
| Cube | 76343737735448 |
| Square root | 205.966017 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 225 |
| Scientific notation | 4.2422 × |
42422 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand four hundred and twenty-two |
| Binary (base 2) | 1010010110110110 |
| Octal (base 8) | 122666 |
| Hexadecimal (base 16) | A5B6 |
| Base 3 | 2011012012 |
| As time | 42422 seconds = 11 h 47 min 2 s |
Is 42422 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42422 ÷ 2 = 21211) | 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 2) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | 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 6) | 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 42422 a prime number?
No. 42422 = 2 × 21211, so it is divisible by 2.
What are the factors of 42422?
1, 2, 21211, 42422.
What is 42422 in binary?
1010010110110110 (hexadecimal A5B6, octal 122666).
What is the square root of 42422?
About 205.9660.
Is 42422 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 42422?
42422 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 21211, the product of two primes.