The number 15425
15425 is a composite number with 6 divisors. Its prime factorisation is Ć 617. Divisors (6): 1, 5, 25, 617, 3085, 15425.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
15425 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
15425 is composite. Its prime factorisation is
- 3
The divisors add up to 19158; without 15425 itself that is 3733, so 15425 is deficient (3733 is less than 15425). Euler's totient Ļ(15425) = 12320 numbers up to 15425 share no factor with it.
- 4
The digits of 15425 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 84 steps to reach 1.
LaTeX source of the formulas on this page
\[ 15425 = 5^{2} \times 617 \]15425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 19158 |
| Euler totient Ļ(n) | 12320 |
| Square | 237930625 |
| Cube | 3670079890625 |
| Square root | 124.197423 (= 5ā617) |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 84 |
| Scientific notation | 1.5425 Ć |
15425 in other forms
| Form | Value |
|---|---|
| In words | fifteen thousand four hundred and twenty-five |
| Binary (base 2) | 11110001000001 |
| Octal (base 8) | 36101 |
| Hexadecimal (base 16) | 3C41 |
| Base 3 | 210011022 |
| As time | 15425 seconds = 4 h 17 min 5 s |
Is 15425 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 (15425 Ć· 5 = 3085) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | 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 3) | 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 15425 a prime number?
No. 15425 = Ć 617, so it is divisible by 5.
What are the factors of 15425?
1, 5, 25, 617, 3085, 15425.
What is 15425 in binary?
11110001000001 (hexadecimal 3C41, octal 36101).
What is the square root of 15425?
About 124.1974, exactly 5ā617.
Is 15425 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 15425?
It is a composite number with 6 divisors.