The number 25055
25055 is a composite number with 4 divisors. Its prime factorisation is 5 × 5011. Divisors (4): 1, 5, 5011, 25055.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 25055: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 5011, the product of two primes.
- 2
25055 is composite. Its prime factorisation is
- 3
The divisors add up to 30072; without 25055 itself that is 5017, so 25055 is deficient (5017 is less than 25055). Euler's totient φ(25055) = 20040 numbers up to 25055 share no factor with it.
- 4
The digits of 25055 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 232 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25055 = 5 \times 5011 \]
25055 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 30072 |
| Euler totient φ(n) | 20040 |
| Square | 627753025 |
| Cube | 15728352041375 |
| Square root | 158.287713 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 232 |
| Scientific notation | 2.5055 × |
25055 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand and fifty-five |
| Binary (base 2) | 110000111011111 |
| Octal (base 8) | 60737 |
| Hexadecimal (base 16) | 61DF |
| Base 3 | 1021100222 |
| As time | 25055 seconds = 6 h 57 min 35 s |
Is 25055 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (25055 ÷ 5 = 5011) | 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 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 7) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25055 a prime number?
No. 25055 = 5 × 5011, so it is divisible by 5.
What are the factors of 25055?
1, 5, 5011, 25055.
What is 25055 in binary?
110000111011111 (hexadecimal 61DF, octal 60737).
What is the square root of 25055?
About 158.2877.
Is 25055 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 25055?
25055 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 5011, the product of two primes.