The number 42718
42718 is a composite number with 16 divisors. Its prime factorisation is 2 × 13 × 31 × 53. Divisors (16): 1, 2, 13, 26, 31, 53, 62, 106, 403, 689, 806, 1378, 1643, 3286, 21359, 42718.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42718 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42718 is composite. Its prime factorisation is
- 3
The divisors add up to 72576; without 42718 itself that is 29858, so 42718 is deficient (29858 is less than 42718). Euler's totient φ(42718) = 18720 numbers up to 42718 share no factor with it.
- 4
The digits of 42718 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42718 = 2 \times 13 \times 31 \times 53 \]
42718 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 72576 |
| Euler totient φ(n) | 18720 |
| Square | 1824827524 |
| Cube | 77952982170232 |
| Square root | 206.683333 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2718 × |
42718 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand seven hundred and eighteen |
| Binary (base 2) | 1010011011011110 |
| Octal (base 8) | 123336 |
| Hexadecimal (base 16) | A6DE |
| Base 3 | 2011121011 |
| As time | 42718 seconds = 11 h 51 min 58 s |
Is 42718 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42718 ÷ 2 = 21359) | 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 3) | 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 4) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | 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 42718 a prime number?
No. 42718 = 2 × 13 × 31 × 53, so it is divisible by 2.
What are the factors of 42718?
1, 2, 13, 26, 31, 53, 62, 106, 403, 689, 806, 1378, 1643, 3286, 21359, 42718.
What is 42718 in binary?
1010011011011110 (hexadecimal A6DE, octal 123336).
What is the square root of 42718?
About 206.6833.
Is 42718 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 42718?
It is a composite number with 16 divisors.