The number 42143
42143 is a composite number with 8 divisors. Its prime factorisation is 17 × 37 × 67. Divisors (8): 1, 17, 37, 67, 629, 1139, 2479, 42143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42143 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42143 is composite. Its prime factorisation is
- 3
The divisors add up to 46512; without 42143 itself that is 4369, so 42143 is deficient (4369 is less than 42143). Euler's totient φ(42143) = 38016 numbers up to 42143 share no factor with it.
- 4
The digits of 42143 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 106 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42143 = 17 \times 37 \times 67 \]
42143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 46512 |
| Euler totient φ(n) | 38016 |
| Square | 1776032449 |
| Cube | 74847335498207 |
| Square root | 205.287603 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 106 |
| Scientific notation | 4.2143 × |
42143 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand one hundred and forty-three |
| Binary (base 2) | 1010010010011111 |
| Octal (base 8) | 122237 |
| Hexadecimal (base 16) | A49F |
| Base 3 | 2010210212 |
| As time | 42143 seconds = 11 h 42 min 23 s |
Is 42143 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 | No (remainder 3) | 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 5) | 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 2) | 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 42143 a prime number?
No. 42143 = 17 × 37 × 67, so it is divisible by 17.
What are the factors of 42143?
1, 17, 37, 67, 629, 1139, 2479, 42143.
What is 42143 in binary?
1010010010011111 (hexadecimal A49F, octal 122237).
What is the square root of 42143?
About 205.2876.
Is 42143 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 42143?
It is a composite number with 8 divisors.