The number 2525
2525 is a composite number with 6 divisors. Its prime factorisation is Ć 101. Divisors (6): 1, 5, 25, 101, 505, 2525.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
2525 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
2525 is composite. Its prime factorisation is
- 3
The divisors add up to 3162; without 2525 itself that is 637, so 2525 is deficient (637 is less than 2525). Euler's totient Ļ(2525) = 2000 numbers up to 2525 share no factor with it.
- 4
The digits of 2525 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 40 steps to reach 1.
LaTeX source of the formulas on this page
\[ 2525 = 5^{2} \times 101 \]2525 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 3162 |
| Euler totient Ļ(n) | 2000 |
| Square | 6375625 |
| Cube | 16098453125 |
| Square root | 50.249378 (= 5ā101) |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 40 |
| Scientific notation | 2.525 Ć |
2525 in other forms
| Form | Value |
|---|---|
| In words | two thousand five hundred and twenty-five |
| Roman numerals | MMDXXV |
| Binary (base 2) | 100111011101 |
| Octal (base 8) | 4735 |
| Hexadecimal (base 16) | 9DD |
| Base 3 | 10110112 |
| As time | 2525 seconds = 42 min 5 s |
Is 2525 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 (2525 Ć· 5 = 505) | 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 5) | 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 5) | 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 6) | 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 2525 a prime number?
No. 2525 = Ć 101, so it is divisible by 5.
What are the factors of 2525?
1, 5, 25, 101, 505, 2525.
What is 2525 in binary?
100111011101 (hexadecimal 9DD, octal 4735).
What is the square root of 2525?
About 50.2494, exactly 5ā101.
What is 2525 in Roman numerals?
MMDXXV.
Is 2525 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 2525?
It is a composite number with 6 divisors.