The number 68425
68425 is a composite number with 24 divisors. Its prime factorisation is × 7 × 17 × 23. Divisors (24): 1, 5, 7, 17, 23, 25, 35, 85, 115, 119, 161, 175, 391, 425, 575, 595 … 68425.
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How to work it out
- 1
What is special about 68425: a Harshad number: divisible by its digit sum 25.
- 2
68425 is composite. Its prime factorisation is
- 3
The divisors add up to 107136; without 68425 itself that is 38711, so 68425 is deficient (38711 is less than 68425). Euler's totient φ(68425) = 42240 numbers up to 68425 share no factor with it.
- 4
The digits of 68425 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 81 steps to reach 1.
LaTeX source of the formulas on this page
\[ 68425 = 5^{2} \times 7 \times 17 \times 23 \]68425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 107136 |
| Euler totient φ(n) | 42240 |
| Square | 4681980625 |
| Cube | 320364524265625 |
| Square root | 261.581727 (= 5√2737) |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 81 |
| Scientific notation | 6.8425 × |
68425 in other forms
| Form | Value |
|---|---|
| In words | sixty-eight thousand four hundred and twenty-five |
| Binary (base 2) | 10000101101001001 |
| Octal (base 8) | 205511 |
| Hexadecimal (base 16) | 10B49 |
| Base 3 | 10110212021 |
| As time | 68425 seconds = 19 h 0 min 25 s |
Is 68425 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (68425 ÷ 5 = 13685) | 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 | Yes (68425 ÷ 7 = 9775) | 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 7) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 68425 a prime number?
No. 68425 = × 7 × 17 × 23, so it is divisible by 5.
What are the factors of 68425?
1, 5, 7, 17, 23, 25, 35, 85, 115, 119, 161, 175, 391, 425, 575, 595, 805, 1955, 2737, 2975, 4025, 9775, 13685, 68425.
What is 68425 in binary?
10000101101001001 (hexadecimal 10B49, octal 205511).
What is the square root of 68425?
About 261.5817, exactly 5√2737.
Is 68425 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 68425?
68425 is a Harshad number: divisible by its digit sum 25.