The number 84071
84071 is a composite number with 8 divisors. Its prime factorisation is 13 × 29 × 223. Divisors (8): 1, 13, 29, 223, 377, 2899, 6467, 84071.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 84071: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
84071 is composite. Its prime factorisation is
- 3
The divisors add up to 94080; without 84071 itself that is 10009, so 84071 is deficient (10009 is less than 84071). Euler's totient φ(84071) = 74592 numbers up to 84071 share no factor with it.
- 4
The digits of 84071 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 89 steps to reach 1.
LaTeX source of the formulas on this page
\[ 84071 = 13 \times 29 \times 223 \]
84071 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 94080 |
| Euler totient φ(n) | 74592 |
| Square | 7067933041 |
| Cube | 594208198689911 |
| Square root | 289.949996 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 89 |
| Scientific notation | 8.4071 × |
84071 in other forms
| Form | Value |
|---|---|
| In words | eighty-four thousand and seventy-one |
| Binary (base 2) | 10100100001100111 |
| Octal (base 8) | 244147 |
| Hexadecimal (base 16) | 14867 |
| Base 3 | 11021022202 |
| As time | 84071 seconds = 23 h 21 min 11 s |
Is 84071 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 3) | 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 5) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 84071 a prime number?
No. 84071 = 13 × 29 × 223, so it is divisible by 13.
What are the factors of 84071?
1, 13, 29, 223, 377, 2899, 6467, 84071.
What is 84071 in binary?
10100100001100111 (hexadecimal 14867, octal 244147).
What is the square root of 84071?
About 289.9500.
Is 84071 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 84071?
84071 is a happy number: repeatedly adding the squares of its digits reaches 1.