The number 42637
42637 is a composite number with 4 divisors. Its prime factorisation is 7 × 6091. Divisors (4): 1, 7, 6091, 42637.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42637: a semiprime: 7 × 6091, the product of two primes.
- 2
42637 is composite. Its prime factorisation is
- 3
The divisors add up to 48736; without 42637 itself that is 6099, so 42637 is deficient (6099 is less than 42637). Euler's totient φ(42637) = 36540 numbers up to 42637 share no factor with it.
- 4
The digits of 42637 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 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42637 = 7 \times 6091 \]
42637 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48736 |
| Euler totient φ(n) | 36540 |
| Square | 1817913769 |
| Cube | 77510389368853 |
| Square root | 206.487288 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2637 × |
42637 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand six hundred and thirty-seven |
| Binary (base 2) | 1010011010001101 |
| Octal (base 8) | 123215 |
| Hexadecimal (base 16) | A68D |
| Base 3 | 2011111011 |
| As time | 42637 seconds = 11 h 50 min 37 s |
Is 42637 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 1) | 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42637 ÷ 7 = 6091) | 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 4) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42637 a prime number?
No. 42637 = 7 × 6091, so it is divisible by 7.
What are the factors of 42637?
1, 7, 6091, 42637.
What is 42637 in binary?
1010011010001101 (hexadecimal A68D, octal 123215).
What is the square root of 42637?
About 206.4873.
Is 42637 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 42637?
42637 is a semiprime: 7 × 6091, the product of two primes.