The number 84421
84421 is the 8228th prime number. Its only divisors are 1 and 84421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 84421: the 8228th prime number.
- 2
84421 is prime, so its only factors are 1 and 84421. It is the 8228th prime; the next prime is 84431 and the one before is 84407.
- 3
The divisors add up to 84422; without 84421 itself that is 1, so 84421 is deficient (1 is less than 84421). Euler's totient φ(84421) = 84420 numbers up to 84421 share no factor with it.
- 4
The digits of 84421 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 58 steps to reach 1.
84421 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 84422 |
| Euler totient φ(n) | 84420 |
| Square | 7126905241 |
| Cube | 601660467350461 |
| Square root | 290.552921 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 58 |
| Scientific notation | 8.4421 × |
84421 in other forms
| Form | Value |
|---|---|
| In words | eighty-four thousand four hundred and twenty-one |
| Binary (base 2) | 10100100111000101 |
| Octal (base 8) | 244705 |
| Hexadecimal (base 16) | 149C5 |
| Base 3 | 11021210201 |
| As time | 84421 seconds = 23 h 27 min 1 s |
Is 84421 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 | No (remainder 1) | 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 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 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | 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 84421 a prime number?
Yes. 84421 is divisible only by 1 and itself.
What are the factors of 84421?
1, 84421.
What is 84421 in binary?
10100100111000101 (hexadecimal 149C5, octal 244705).
What is the square root of 84421?
About 290.5529.
Is 84421 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 84421?
84421 is the 8228th prime number.