The number 40143
40143 is a composite number with 4 divisors. Its prime factorisation is 3 × 13381. Divisors (4): 1, 3, 13381, 40143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40143: a semiprime: 3 × 13381, the product of two primes.
- 2
40143 is composite. Its prime factorisation is
- 3
The divisors add up to 53528; without 40143 itself that is 13385, so 40143 is deficient (13385 is less than 40143). Euler's totient φ(40143) = 26760 numbers up to 40143 share no factor with it.
- 4
The digits of 40143 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 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40143 = 3 \times 13381 \]
40143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 53528 |
| Euler totient φ(n) | 26760 |
| Square | 1611460449 |
| Cube | 64688856804207 |
| Square root | 200.357181 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.0143 × |
40143 in other forms
| Form | Value |
|---|---|
| In words | forty thousand one hundred and forty-three |
| Binary (base 2) | 1001110011001111 |
| Octal (base 8) | 116317 |
| Hexadecimal (base 16) | 9CCF |
| Base 3 | 2001001210 |
| As time | 40143 seconds = 11 h 9 min 3 s |
Is 40143 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 (40143 ÷ 3 = 13381) | 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 3) | 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 7) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | 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 40143 a prime number?
No. 40143 = 3 × 13381, so it is divisible by 3.
What are the factors of 40143?
1, 3, 13381, 40143.
What is 40143 in binary?
1001110011001111 (hexadecimal 9CCF, octal 116317).
What is the square root of 40143?
About 200.3572.
Is 40143 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 40143?
40143 is a semiprime: 3 × 13381, the product of two primes.