The number 3143
3143 is a composite number with 4 divisors. Its prime factorisation is 7 × 449. Divisors (4): 1, 7, 449, 3143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 3143: a semiprime: 7 × 449, the product of two primes.
- 2
3143 is composite. Its prime factorisation is
- 3
The divisors add up to 3600; without 3143 itself that is 457, so 3143 is deficient (457 is less than 3143). Euler's totient φ(3143) = 2688 numbers up to 3143 share no factor with it.
- 4
The digits of 3143 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 105 steps to reach 1.
LaTeX source of the formulas on this page
\[ 3143 = 7 \times 449 \]
3143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 3600 |
| Euler totient φ(n) | 2688 |
| Square | 9878449 |
| Cube | 31047965207 |
| Square root | 56.062465 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 105 |
| Scientific notation | 3.143 × |
3143 in other forms
| Form | Value |
|---|---|
| In words | three thousand one hundred and forty-three |
| Roman numerals | MMMCXLIII |
| Binary (base 2) | 110001000111 |
| Octal (base 8) | 6107 |
| Hexadecimal (base 16) | C47 |
| Base 3 | 11022102 |
| As time | 3143 seconds = 52 min 23 s |
Is 3143 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 2) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (3143 ÷ 7 = 449) | 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 2) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 3143 a prime number?
No. 3143 = 7 × 449, so it is divisible by 7.
What are the factors of 3143?
1, 7, 449, 3143.
What is 3143 in binary?
110001000111 (hexadecimal C47, octal 6107).
What is the square root of 3143?
About 56.0625.
What is 3143 in Roman numerals?
MMMCXLIII.
Is 3143 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 3143?
3143 is a semiprime: 7 × 449, the product of two primes.