The number 42586
42586 is a composite number with 8 divisors. Its prime factorisation is 2 × 107 × 199. Divisors (8): 1, 2, 107, 199, 214, 398, 21293, 42586.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42586 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42586 is composite. Its prime factorisation is
- 3
The divisors add up to 64800; without 42586 itself that is 22214, so 42586 is deficient (22214 is less than 42586). Euler's totient φ(42586) = 20988 numbers up to 42586 share no factor with it.
- 4
The digits of 42586 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42586 = 2 \times 107 \times 199 \]
42586 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 64800 |
| Euler totient φ(n) | 20988 |
| Square | 1813567396 |
| Cube | 77232581126056 |
| Square root | 206.363757 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2586 × |
42586 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand five hundred and eighty-six |
| Binary (base 2) | 1010011001011010 |
| Octal (base 8) | 123132 |
| Hexadecimal (base 16) | A65A |
| Base 3 | 2011102021 |
| As time | 42586 seconds = 11 h 49 min 46 s |
Is 42586 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42586 ÷ 2 = 21293) | 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 1) | 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 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | 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 42586 a prime number?
No. 42586 = 2 × 107 × 199, so it is divisible by 2.
What are the factors of 42586?
1, 2, 107, 199, 214, 398, 21293, 42586.
What is 42586 in binary?
1010011001011010 (hexadecimal A65A, octal 123132).
What is the square root of 42586?
About 206.3638.
Is 42586 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 42586?
It is a composite number with 8 divisors.