The number 25075
25075 is a composite number with 12 divisors. Its prime factorisation is × 17 × 59. Divisors (12): 1, 5, 17, 25, 59, 85, 295, 425, 1003, 1475, 5015, 25075.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 25075: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
25075 is composite. Its prime factorisation is
- 3
The divisors add up to 33480; without 25075 itself that is 8405, so 25075 is deficient (8405 is less than 25075). Euler's totient φ(25075) = 18560 numbers up to 25075 share no factor with it.
- 4
The digits of 25075 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 64 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25075 = 5^{2} \times 17 \times 59 \]25075 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 33480 |
| Euler totient φ(n) | 18560 |
| Square | 628755625 |
| Cube | 15766047296875 |
| Square root | 158.350876 (= 5√1003) |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 64 |
| Scientific notation | 2.5075 × |
25075 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand and seventy-five |
| Binary (base 2) | 110000111110011 |
| Octal (base 8) | 60763 |
| Hexadecimal (base 16) | 61F3 |
| Base 3 | 1021101201 |
| As time | 25075 seconds = 6 h 57 min 55 s |
Is 25075 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (25075 ÷ 5 = 5015) | 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 1) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25075 a prime number?
No. 25075 = × 17 × 59, so it is divisible by 5.
What are the factors of 25075?
1, 5, 17, 25, 59, 85, 295, 425, 1003, 1475, 5015, 25075.
What is 25075 in binary?
110000111110011 (hexadecimal 61F3, octal 60763).
What is the square root of 25075?
About 158.3509, exactly 5√1003.
Is 25075 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 25075?
25075 is a happy number: repeatedly adding the squares of its digits reaches 1.