The number 36021
36021 is a composite number with 4 divisors. Its prime factorisation is 3 × 12007. Divisors (4): 1, 3, 12007, 36021.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 36021: a semiprime: 3 × 12007, the product of two primes.
- 2
36021 is composite. Its prime factorisation is
- 3
The divisors add up to 48032; without 36021 itself that is 12011, so 36021 is deficient (12011 is less than 36021). Euler's totient φ(36021) = 24012 numbers up to 36021 share no factor with it.
- 4
The digits of 36021 add up to 12, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 41 steps to reach 1.
LaTeX source of the formulas on this page
\[ 36021 = 3 \times 12007 \]
36021 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48032 |
| Euler totient φ(n) | 24012 |
| Square | 1297512441 |
| Cube | 46737695637261 |
| Square root | 189.791991 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 41 |
| Scientific notation | 3.6021 × |
36021 in other forms
| Form | Value |
|---|---|
| In words | thirty-six thousand and twenty-one |
| Binary (base 2) | 1000110010110101 |
| Octal (base 8) | 106265 |
| Hexadecimal (base 16) | 8CB5 |
| Base 3 | 1211102010 |
| As time | 36021 seconds = 10 h 0 min 21 s |
Is 36021 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 (36021 ÷ 3 = 12007) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 3) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 36021 a prime number?
No. 36021 = 3 × 12007, so it is divisible by 3.
What are the factors of 36021?
1, 3, 12007, 36021.
What is 36021 in binary?
1000110010110101 (hexadecimal 8CB5, octal 106265).
What is the square root of 36021?
About 189.7920.
Is 36021 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 36021?
36021 is a semiprime: 3 × 12007, the product of two primes.