The number 42635
42635 is a composite number with 4 divisors. Its prime factorisation is 5 × 8527. Divisors (4): 1, 5, 8527, 42635.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42635: a semiprime: 5 × 8527, the product of two primes.
- 2
42635 is composite. Its prime factorisation is
- 3
The divisors add up to 51168; without 42635 itself that is 8533, so 42635 is deficient (8533 is less than 42635). Euler's totient φ(42635) = 34104 numbers up to 42635 share no factor with it.
- 4
The digits of 42635 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 88 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42635 = 5 \times 8527 \]
42635 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 51168 |
| Euler totient φ(n) | 34104 |
| Square | 1817743225 |
| Cube | 77499482397875 |
| Square root | 206.482445 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 88 |
| Scientific notation | 4.2635 × |
42635 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand six hundred and thirty-five |
| Binary (base 2) | 1010011010001011 |
| Octal (base 8) | 123213 |
| Hexadecimal (base 16) | A68B |
| Base 3 | 2011111002 |
| As time | 42635 seconds = 11 h 50 min 35 s |
Is 42635 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (42635 ÷ 5 = 8527) | 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 | 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 3) | 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 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42635 a prime number?
No. 42635 = 5 × 8527, so it is divisible by 5.
What are the factors of 42635?
1, 5, 8527, 42635.
What is 42635 in binary?
1010011010001011 (hexadecimal A68B, octal 123213).
What is the square root of 42635?
About 206.4824.
Is 42635 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42635?
42635 is a semiprime: 5 × 8527, the product of two primes.