The number 3725
3725 is a composite number with 6 divisors. Its prime factorisation is Ć 149. Divisors (6): 1, 5, 25, 149, 745, 3725.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
3725 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
3725 is composite. Its prime factorisation is
- 3
The divisors add up to 4650; without 3725 itself that is 925, so 3725 is deficient (925 is less than 3725). Euler's totient Ļ(3725) = 2960 numbers up to 3725 share no factor with it.
- 4
The digits of 3725 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 38 steps to reach 1.
LaTeX source of the formulas on this page
\[ 3725 = 5^{2} \times 149 \]3725 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 4650 |
| Euler totient Ļ(n) | 2960 |
| Square | 13875625 |
| Cube | 51686703125 |
| Square root | 61.032778 (= 5ā149) |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 38 |
| Scientific notation | 3.725 Ć |
3725 in other forms
| Form | Value |
|---|---|
| In words | three thousand seven hundred and twenty-five |
| Roman numerals | MMMDCCXXV |
| Binary (base 2) | 111010001101 |
| Octal (base 8) | 7215 |
| Hexadecimal (base 16) | E8D |
| Base 3 | 12002222 |
| As time | 3725 seconds = 1 h 2 min 5 s |
Is 3725 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 (3725 Ć· 5 = 745) | 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 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 5) | 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 7) | 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 3725 a prime number?
No. 3725 = Ć 149, so it is divisible by 5.
What are the factors of 3725?
1, 5, 25, 149, 745, 3725.
What is 3725 in binary?
111010001101 (hexadecimal E8D, octal 7215).
What is the square root of 3725?
About 61.0328, exactly 5ā149.
What is 3725 in Roman numerals?
MMMDCCXXV.
Is 3725 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 3725?
It is a composite number with 6 divisors.