The number 80425
80425 is a composite number with 6 divisors. Its prime factorisation is Ć 3217. Divisors (6): 1, 5, 25, 3217, 16085, 80425.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80425: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
80425 is composite. Its prime factorisation is
- 3
The divisors add up to 99758; without 80425 itself that is 19333, so 80425 is deficient (19333 is less than 80425). Euler's totient Ļ(80425) = 64320 numbers up to 80425 share no factor with it.
- 4
The digits of 80425 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 107 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80425 = 5^{2} \times 3217 \]80425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 99758 |
| Euler totient Ļ(n) | 64320 |
| Square | 6468180625 |
| Cube | 520203426765625 |
| Square root | 283.593018 (= 5ā3217) |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 107 |
| Scientific notation | 8.0425 Ć |
80425 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand four hundred and twenty-five |
| Binary (base 2) | 10011101000101001 |
| Octal (base 8) | 235051 |
| Hexadecimal (base 16) | 13A29 |
| Base 3 | 11002022201 |
| As time | 80425 seconds = 22 h 20 min 25 s |
Is 80425 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 (80425 Ć· 5 = 16085) | 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 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 1) | 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 4) | 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 80425 a prime number?
No. 80425 = Ć 3217, so it is divisible by 5.
What are the factors of 80425?
1, 5, 25, 3217, 16085, 80425.
What is 80425 in binary?
10011101000101001 (hexadecimal 13A29, octal 235051).
What is the square root of 80425?
About 283.5930, exactly 5ā3217.
Is 80425 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 80425?
80425 is a happy number: repeatedly adding the squares of its digits reaches 1.