The number 75425
75425 is a composite number with 12 divisors. Its prime factorisation is × 7 × 431. Divisors (12): 1, 5, 7, 25, 35, 175, 431, 2155, 3017, 10775, 15085, 75425.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
75425 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
75425 is composite. Its prime factorisation is
- 3
The divisors add up to 107136; without 75425 itself that is 31711, so 75425 is deficient (31711 is less than 75425). Euler's totient φ(75425) = 51600 numbers up to 75425 share no factor with it.
- 4
The digits of 75425 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 138 steps to reach 1.
LaTeX source of the formulas on this page
\[ 75425 = 5^{2} \times 7 \times 431 \]75425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 107136 |
| Euler totient φ(n) | 51600 |
| Square | 5688930625 |
| Cube | 429087592390625 |
| Square root | 274.636123 (= 5√3017) |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 138 |
| Scientific notation | 7.5425 × |
75425 in other forms
| Form | Value |
|---|---|
| In words | seventy-five thousand four hundred and twenty-five |
| Binary (base 2) | 10010011010100001 |
| Octal (base 8) | 223241 |
| Hexadecimal (base 16) | 126A1 |
| Base 3 | 10211110112 |
| As time | 75425 seconds = 20 h 57 min 5 s |
Is 75425 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 (75425 ÷ 5 = 15085) | 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 | Yes (75425 ÷ 7 = 10775) | 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 1) | 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 9) | 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 75425 a prime number?
No. 75425 = × 7 × 431, so it is divisible by 5.
What are the factors of 75425?
1, 5, 7, 25, 35, 175, 431, 2155, 3017, 10775, 15085, 75425.
What is 75425 in binary?
10010011010100001 (hexadecimal 126A1, octal 223241).
What is the square root of 75425?
About 274.6361, exactly 5√3017.
Is 75425 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 75425?
It is a composite number with 12 divisors.