The number 81027
81027 is a composite number with 8 divisors. Its prime factorisation is × 3001. Divisors (8): 1, 3, 9, 27, 3001, 9003, 27009, 81027.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
81027 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
81027 is composite. Its prime factorisation is
- 3
The divisors add up to 120080; without 81027 itself that is 39053, so 81027 is deficient (39053 is less than 81027). Euler's totient φ(81027) = 54000 numbers up to 81027 share no factor with it.
- 4
The digits of 81027 add up to 18, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 81027 = 3^{3} \times 3001 \]81027 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 120080 |
| Euler totient φ(n) | 54000 |
| Square | 6565374729 |
| Cube | 531972618166683 |
| Square root | 284.652420 (= 3√9003) |
| Digit sum / digital root | 18 / 9 |
| Collatz steps to 1 | 76 |
| Scientific notation | 8.1027 × |
81027 in other forms
| Form | Value |
|---|---|
| In words | eighty-one thousand and twenty-seven |
| Binary (base 2) | 10011110010000011 |
| Octal (base 8) | 236203 |
| Hexadecimal (base 16) | 13C83 |
| Base 3 | 11010011000 |
| As time | 81027 seconds = 22 h 30 min 27 s |
Is 81027 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 | Yes (81027 ÷ 3 = 27009) | 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 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (81027 ÷ 9 = 9003) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 81027 a prime number?
No. 81027 = × 3001, so it is divisible by 3.
What are the factors of 81027?
1, 3, 9, 27, 3001, 9003, 27009, 81027.
What is 81027 in binary?
10011110010000011 (hexadecimal 13C83, octal 236203).
What is the square root of 81027?
About 284.6524, exactly 3√9003.
Is 81027 divisible by 3?
Yes. Its digits add up to 18, a multiple of 3.
What is special about the number 81027?
It is a composite number with 8 divisors.