The number 42725
42725 is a composite number with 6 divisors. Its prime factorisation is Ć 1709. Divisors (6): 1, 5, 25, 1709, 8545, 42725.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42725 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42725 is composite. Its prime factorisation is
- 3
The divisors add up to 53010; without 42725 itself that is 10285, so 42725 is deficient (10285 is less than 42725). Euler's totient Ļ(42725) = 34160 numbers up to 42725 share no factor with it.
- 4
The digits of 42725 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 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42725 = 5^{2} \times 1709 \]42725 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 53010 |
| Euler totient Ļ(n) | 34160 |
| Square | 1825425625 |
| Cube | 77991309828125 |
| Square root | 206.700266 (= 5ā1709) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2725 Ć |
42725 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand seven hundred and twenty-five |
| Binary (base 2) | 1010011011100101 |
| Octal (base 8) | 123345 |
| Hexadecimal (base 16) | A6E5 |
| Base 3 | 2011121102 |
| As time | 42725 seconds = 11 h 52 min 5 s |
Is 42725 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 | Yes (42725 Ć· 5 = 8545) | 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 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 5) | 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 1) | 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 42725 a prime number?
No. 42725 = Ć 1709, so it is divisible by 5.
What are the factors of 42725?
1, 5, 25, 1709, 8545, 42725.
What is 42725 in binary?
1010011011100101 (hexadecimal A6E5, octal 123345).
What is the square root of 42725?
About 206.7003, exactly 5ā1709.
Is 42725 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42725?
It is a composite number with 6 divisors.