The number 40291
40291 is a composite number with 4 divisors. Its prime factorisation is 43 × 937. Divisors (4): 1, 43, 937, 40291.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40291: a semiprime: 43 × 937, the product of two primes.
- 2
40291 is composite. Its prime factorisation is
- 3
The divisors add up to 41272; without 40291 itself that is 981, so 40291 is deficient (981 is less than 40291). Euler's totient φ(40291) = 39312 numbers up to 40291 share no factor with it.
- 4
The digits of 40291 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 137 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40291 = 43 \times 937 \]
40291 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 41272 |
| Euler totient φ(n) | 39312 |
| Square | 1623364681 |
| Cube | 65406986362171 |
| Square root | 200.726182 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 137 |
| Scientific notation | 4.0291 × |
40291 in other forms
| Form | Value |
|---|---|
| In words | forty thousand two hundred and ninety-one |
| Binary (base 2) | 1001110101100011 |
| Octal (base 8) | 116543 |
| Hexadecimal (base 16) | 9D63 |
| Base 3 | 2001021021 |
| As time | 40291 seconds = 11 h 11 min 31 s |
Is 40291 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 1) | 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 | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40291 a prime number?
No. 40291 = 43 × 937, so it is divisible by 43.
What are the factors of 40291?
1, 43, 937, 40291.
What is 40291 in binary?
1001110101100011 (hexadecimal 9D63, octal 116543).
What is the square root of 40291?
About 200.7262.
Is 40291 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 40291?
40291 is a semiprime: 43 × 937, the product of two primes.