The number 42917
42917 is a composite number with 4 divisors. Its prime factorisation is 7 × 6131. Divisors (4): 1, 7, 6131, 42917.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42917: a semiprime: 7 × 6131, the product of two primes.
- 2
42917 is composite. Its prime factorisation is
- 3
The divisors add up to 49056; without 42917 itself that is 6139, so 42917 is deficient (6139 is less than 42917). Euler's totient φ(42917) = 36780 numbers up to 42917 share no factor with it.
- 4
The digits of 42917 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42917 = 7 \times 6131 \]
42917 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 49056 |
| Euler totient φ(n) | 36780 |
| Square | 1841868889 |
| Cube | 79047487109213 |
| Square root | 207.164186 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2917 × |
42917 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and seventeen |
| Binary (base 2) | 1010011110100101 |
| Octal (base 8) | 123645 |
| Hexadecimal (base 16) | A7A5 |
| Base 3 | 2011212112 |
| As time | 42917 seconds = 11 h 55 min 17 s |
Is 42917 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | 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 1) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42917 ÷ 7 = 6131) | 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 5) | 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 7) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42917 a prime number?
No. 42917 = 7 × 6131, so it is divisible by 7.
What are the factors of 42917?
1, 7, 6131, 42917.
What is 42917 in binary?
1010011110100101 (hexadecimal A7A5, octal 123645).
What is the square root of 42917?
About 207.1642.
Is 42917 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 42917?
42917 is a semiprime: 7 × 6131, the product of two primes.