The number 2425
2425 is a composite number with 6 divisors. Its prime factorisation is Ć 97. Divisors (6): 1, 5, 25, 97, 485, 2425.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 2425: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
2425 is composite. Its prime factorisation is
- 3
The divisors add up to 3038; without 2425 itself that is 613, so 2425 is deficient (613 is less than 2425). Euler's totient Ļ(2425) = 1920 numbers up to 2425 share no factor with it.
- 4
The digits of 2425 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 164 steps to reach 1.
LaTeX source of the formulas on this page
\[ 2425 = 5^{2} \times 97 \]2425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 3038 |
| Euler totient Ļ(n) | 1920 |
| Square | 5880625 |
| Cube | 14260515625 |
| Square root | 49.244289 (= 5ā97) |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 164 |
| Scientific notation | 2.425 Ć |
2425 in other forms
| Form | Value |
|---|---|
| In words | two thousand four hundred and twenty-five |
| Roman numerals | MMCDXXV |
| Binary (base 2) | 100101111001 |
| Octal (base 8) | 4571 |
| Hexadecimal (base 16) | 979 |
| Base 3 | 10022211 |
| As time | 2425 seconds = 40 min 25 s |
Is 2425 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (2425 Ć· 5 = 485) | 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 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 4) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 2425 a prime number?
No. 2425 = Ć 97, so it is divisible by 5.
What are the factors of 2425?
1, 5, 25, 97, 485, 2425.
What is 2425 in binary?
100101111001 (hexadecimal 979, octal 4571).
What is the square root of 2425?
About 49.2443, exactly 5ā97.
What is 2425 in Roman numerals?
MMCDXXV.
Is 2425 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 2425?
2425 is a happy number: repeatedly adding the squares of its digits reaches 1.