The number 42235
42235 is a composite number with 4 divisors. Its prime factorisation is 5 × 8447. Divisors (4): 1, 5, 8447, 42235.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42235: a semiprime: 5 × 8447, the product of two primes.
- 2
42235 is composite. Its prime factorisation is
- 3
The divisors add up to 50688; without 42235 itself that is 8453, so 42235 is deficient (8453 is less than 42235). Euler's totient φ(42235) = 33784 numbers up to 42235 share no factor with it.
- 4
The digits of 42235 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 80 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42235 = 5 \times 8447 \]
42235 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 50688 |
| Euler totient φ(n) | 33784 |
| Square | 1783795225 |
| Cube | 75338591327875 |
| Square root | 205.511557 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 80 |
| Scientific notation | 4.2235 × |
42235 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand two hundred and thirty-five |
| Binary (base 2) | 1010010011111011 |
| Octal (base 8) | 122373 |
| Hexadecimal (base 16) | A4FB |
| Base 3 | 2010221021 |
| As time | 42235 seconds = 11 h 43 min 55 s |
Is 42235 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (42235 ÷ 5 = 8447) | 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 | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42235 a prime number?
No. 42235 = 5 × 8447, so it is divisible by 5.
What are the factors of 42235?
1, 5, 8447, 42235.
What is 42235 in binary?
1010010011111011 (hexadecimal A4FB, octal 122373).
What is the square root of 42235?
About 205.5116.
Is 42235 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 42235?
42235 is a semiprime: 5 × 8447, the product of two primes.