The number 42518
42518 is a composite number with 8 divisors. Its prime factorisation is 2 × 7 × 3037. Divisors (8): 1, 2, 7, 14, 3037, 6074, 21259, 42518.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42518 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42518 is composite. Its prime factorisation is
- 3
The divisors add up to 72912; without 42518 itself that is 30394, so 42518 is deficient (30394 is less than 42518). Euler's totient φ(42518) = 18216 numbers up to 42518 share no factor with it.
- 4
The digits of 42518 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 62 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42518 = 2 \times 7 \times 3037 \]
42518 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 72912 |
| Euler totient φ(n) | 18216 |
| Square | 1807780324 |
| Cube | 76863203815832 |
| Square root | 206.198933 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 62 |
| Scientific notation | 4.2518 × |
42518 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand five hundred and eighteen |
| Binary (base 2) | 1010011000010110 |
| Octal (base 8) | 123026 |
| Hexadecimal (base 16) | A616 |
| Base 3 | 2011022202 |
| As time | 42518 seconds = 11 h 48 min 38 s |
Is 42518 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42518 ÷ 2 = 21259) | 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 3) | 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 | Yes (42518 ÷ 7 = 6074) | 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 2) | 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 3) | 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 42518 a prime number?
No. 42518 = 2 × 7 × 3037, so it is divisible by 2.
What are the factors of 42518?
1, 2, 7, 14, 3037, 6074, 21259, 42518.
What is 42518 in binary?
1010011000010110 (hexadecimal A616, octal 123026).
What is the square root of 42518?
About 206.1989.
Is 42518 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42518?
It is a composite number with 8 divisors.