The number 72425
72425 is a composite number with 6 divisors. Its prime factorisation is Ć 2897. Divisors (6): 1, 5, 25, 2897, 14485, 72425.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
72425 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
72425 is composite. Its prime factorisation is
- 3
The divisors add up to 89838; without 72425 itself that is 17413, so 72425 is deficient (17413 is less than 72425). Euler's totient Ļ(72425) = 57920 numbers up to 72425 share no factor with it.
- 4
The digits of 72425 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 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 72425 = 5^{2} \times 2897 \]72425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 89838 |
| Euler totient Ļ(n) | 57920 |
| Square | 5245380625 |
| Cube | 379896691765625 |
| Square root | 269.118933 (= 5ā2897) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 94 |
| Scientific notation | 7.2425 Ć |
72425 in other forms
| Form | Value |
|---|---|
| In words | seventy-two thousand four hundred and twenty-five |
| Binary (base 2) | 10001101011101001 |
| Octal (base 8) | 215351 |
| Hexadecimal (base 16) | 11AE9 |
| Base 3 | 10200100102 |
| As time | 72425 seconds = 20 h 7 min 5 s |
Is 72425 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 (72425 Ć· 5 = 14485) | 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 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 1) | 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 72425 a prime number?
No. 72425 = Ć 2897, so it is divisible by 5.
What are the factors of 72425?
1, 5, 25, 2897, 14485, 72425.
What is 72425 in binary?
10001101011101001 (hexadecimal 11AE9, octal 215351).
What is the square root of 72425?
About 269.1189, exactly 5ā2897.
Is 72425 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 72425?
It is a composite number with 6 divisors.