The number 42843
42843 is a composite number with 4 divisors. Its prime factorisation is 3 × 14281. Divisors (4): 1, 3, 14281, 42843.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42843: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 3 × 14281, the product of two primes.
- 2
42843 is composite. Its prime factorisation is
- 3
The divisors add up to 57128; without 42843 itself that is 14285, so 42843 is deficient (14285 is less than 42843). Euler's totient φ(42843) = 28560 numbers up to 42843 share no factor with it.
- 4
The digits of 42843 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42843 = 3 \times 14281 \]
42843 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57128 |
| Euler totient φ(n) | 28560 |
| Square | 1835522649 |
| Cube | 78639296851107 |
| Square root | 206.985507 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.2843 × |
42843 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand eight hundred and forty-three |
| Binary (base 2) | 1010011101011011 |
| Octal (base 8) | 123533 |
| Hexadecimal (base 16) | A75B |
| Base 3 | 2011202210 |
| As time | 42843 seconds = 11 h 54 min 3 s |
Is 42843 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 (42843 ÷ 3 = 14281) | 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 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 3) | 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 9) | 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 42843 a prime number?
No. 42843 = 3 × 14281, so it is divisible by 3.
What are the factors of 42843?
1, 3, 14281, 42843.
What is 42843 in binary?
1010011101011011 (hexadecimal A75B, octal 123533).
What is the square root of 42843?
About 206.9855.
Is 42843 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 42843?
42843 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 3 × 14281, the product of two primes.