The number 84025
84025 is a composite number with 6 divisors. Its prime factorisation is Ć 3361. Divisors (6): 1, 5, 25, 3361, 16805, 84025.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 84025: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
84025 is composite. Its prime factorisation is
- 3
The divisors add up to 104222; without 84025 itself that is 20197, so 84025 is deficient (20197 is less than 84025). Euler's totient Ļ(84025) = 67200 numbers up to 84025 share no factor with it.
- 4
The digits of 84025 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 133 steps to reach 1.
LaTeX source of the formulas on this page
\[ 84025 = 5^{2} \times 3361 \]84025 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 104222 |
| Euler totient Ļ(n) | 67200 |
| Square | 7060200625 |
| Cube | 593233357515625 |
| Square root | 289.870661 (= 5ā3361) |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 133 |
| Scientific notation | 8.4025 Ć |
84025 in other forms
| Form | Value |
|---|---|
| In words | eighty-four thousand and twenty-five |
| Binary (base 2) | 10100100000111001 |
| Octal (base 8) | 244071 |
| Hexadecimal (base 16) | 14839 |
| Base 3 | 11021021001 |
| As time | 84025 seconds = 23 h 20 min 25 s |
Is 84025 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 (84025 Ć· 5 = 16805) | 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 4) | 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 7) | 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 84025 a prime number?
No. 84025 = Ć 3361, so it is divisible by 5.
What are the factors of 84025?
1, 5, 25, 3361, 16805, 84025.
What is 84025 in binary?
10100100000111001 (hexadecimal 14839, octal 244071).
What is the square root of 84025?
About 289.8707, exactly 5ā3361.
Is 84025 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 84025?
84025 is a happy number: repeatedly adding the squares of its digits reaches 1.