The number 42885
42885 is a composite number with 12 divisors. Its prime factorisation is × 5 × 953. Divisors (12): 1, 3, 5, 9, 15, 45, 953, 2859, 4765, 8577, 14295, 42885.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42885 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42885 is composite. Its prime factorisation is
- 3
The divisors add up to 74412; without 42885 itself that is 31527, so 42885 is deficient (31527 is less than 42885). Euler's totient φ(42885) = 22848 numbers up to 42885 share no factor with it.
- 4
The digits of 42885 add up to 27, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42885 = 3^{2} \times 5 \times 953 \]42885 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 74412 |
| Euler totient φ(n) | 22848 |
| Square | 1839123225 |
| Cube | 78870799504125 |
| Square root | 207.086938 (= 3√4765) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.2885 × |
42885 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand eight hundred and eighty-five |
| Binary (base 2) | 1010011110000101 |
| Octal (base 8) | 123605 |
| Hexadecimal (base 16) | A785 |
| Base 3 | 2011211100 |
| As time | 42885 seconds = 11 h 54 min 45 s |
Is 42885 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 | Yes (42885 ÷ 3 = 14295) | 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 | Yes (42885 ÷ 5 = 8577) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 | Yes (42885 ÷ 9 = 4765) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42885 a prime number?
No. 42885 = × 5 × 953, so it is divisible by 3.
What are the factors of 42885?
1, 3, 5, 9, 15, 45, 953, 2859, 4765, 8577, 14295, 42885.
What is 42885 in binary?
1010011110000101 (hexadecimal A785, octal 123605).
What is the square root of 42885?
About 207.0869, exactly 3√4765.
Is 42885 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 42885?
It is a composite number with 12 divisors.