The number 40521
40521 is a composite number with 8 divisors. Its prime factorisation is 3 × 13 × 1039. Divisors (8): 1, 3, 13, 39, 1039, 3117, 13507, 40521.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40521 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40521 is composite. Its prime factorisation is
- 3
The divisors add up to 58240; without 40521 itself that is 17719, so 40521 is deficient (17719 is less than 40521). Euler's totient φ(40521) = 24912 numbers up to 40521 share no factor with it.
- 4
The digits of 40521 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 137 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40521 = 3 \times 13 \times 1039 \]
40521 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 58240 |
| Euler totient φ(n) | 24912 |
| Square | 1641951441 |
| Cube | 66533514340761 |
| Square root | 201.298286 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 137 |
| Scientific notation | 4.0521 × |
40521 in other forms
| Form | Value |
|---|---|
| In words | forty thousand five hundred and twenty-one |
| Binary (base 2) | 1001111001001001 |
| Octal (base 8) | 117111 |
| Hexadecimal (base 16) | 9E49 |
| Base 3 | 2001120210 |
| As time | 40521 seconds = 11 h 15 min 21 s |
Is 40521 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 (40521 ÷ 3 = 13507) | 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 5) | 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 1) | 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 8) | 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 40521 a prime number?
No. 40521 = 3 × 13 × 1039, so it is divisible by 3.
What are the factors of 40521?
1, 3, 13, 39, 1039, 3117, 13507, 40521.
What is 40521 in binary?
1001111001001001 (hexadecimal 9E49, octal 117111).
What is the square root of 40521?
About 201.2983.
Is 40521 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 40521?
It is a composite number with 8 divisors.