The number 2725
2725 is a composite number with 6 divisors. Its prime factorisation is Ć 109. Divisors (6): 1, 5, 25, 109, 545, 2725.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 2725: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
2725 is composite. Its prime factorisation is
- 3
The divisors add up to 3410; without 2725 itself that is 685, so 2725 is deficient (685 is less than 2725). Euler's totient Ļ(2725) = 2160 numbers up to 2725 share no factor with it.
- 4
The digits of 2725 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 66 steps to reach 1.
LaTeX source of the formulas on this page
\[ 2725 = 5^{2} \times 109 \]2725 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 3410 |
| Euler totient Ļ(n) | 2160 |
| Square | 7425625 |
| Cube | 20234828125 |
| Square root | 52.201533 (= 5ā109) |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 66 |
| Scientific notation | 2.725 Ć |
2725 in other forms
| Form | Value |
|---|---|
| In words | two thousand seven hundred and twenty-five |
| Roman numerals | MMDCCXXV |
| Binary (base 2) | 101010100101 |
| Octal (base 8) | 5245 |
| Hexadecimal (base 16) | AA5 |
| Base 3 | 10201221 |
| As time | 2725 seconds = 45 min 25 s |
Is 2725 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 (2725 Ć· 5 = 545) | 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 2) | 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 7) | 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 8) | 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 2725 a prime number?
No. 2725 = Ć 109, so it is divisible by 5.
What are the factors of 2725?
1, 5, 25, 109, 545, 2725.
What is 2725 in binary?
101010100101 (hexadecimal AA5, octal 5245).
What is the square root of 2725?
About 52.2015, exactly 5ā109.
What is 2725 in Roman numerals?
MMDCCXXV.
Is 2725 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 2725?
2725 is a happy number: repeatedly adding the squares of its digits reaches 1.