The number 81067
81067 is a composite number with 8 divisors. Its prime factorisation is 7 × 37 × 313. Divisors (8): 1, 7, 37, 259, 313, 2191, 11581, 81067.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
81067 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
81067 is composite. Its prime factorisation is
- 3
The divisors add up to 95456; without 81067 itself that is 14389, so 81067 is deficient (14389 is less than 81067). Euler's totient φ(81067) = 67392 numbers up to 81067 share no factor with it.
- 4
The digits of 81067 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 63 steps to reach 1.
LaTeX source of the formulas on this page
\[ 81067 = 7 \times 37 \times 313 \]
81067 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 95456 |
| Euler totient φ(n) | 67392 |
| Square | 6571858489 |
| Cube | 532760852127763 |
| Square root | 284.722672 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 63 |
| Scientific notation | 8.1067 × |
81067 in other forms
| Form | Value |
|---|---|
| In words | eighty-one thousand and sixty-seven |
| Binary (base 2) | 10011110010101011 |
| Octal (base 8) | 236253 |
| Hexadecimal (base 16) | 13CAB |
| Base 3 | 11010012111 |
| As time | 81067 seconds = 22 h 31 min 7 s |
Is 81067 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (81067 ÷ 7 = 11581) | 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 | No (remainder 4) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 81067 a prime number?
No. 81067 = 7 × 37 × 313, so it is divisible by 7.
What are the factors of 81067?
1, 7, 37, 259, 313, 2191, 11581, 81067.
What is 81067 in binary?
10011110010101011 (hexadecimal 13CAB, octal 236253).
What is the square root of 81067?
About 284.7227.
Is 81067 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 81067?
It is a composite number with 8 divisors.