The number 42837
42837 is a composite number with 8 divisors. Its prime factorisation is 3 × 109 × 131. Divisors (8): 1, 3, 109, 131, 327, 393, 14279, 42837.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42837 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42837 is composite. Its prime factorisation is
- 3
The divisors add up to 58080; without 42837 itself that is 15243, so 42837 is deficient (15243 is less than 42837). Euler's totient φ(42837) = 28080 numbers up to 42837 share no factor with it.
- 4
The digits of 42837 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42837 = 3 \times 109 \times 131 \]
42837 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 58080 |
| Euler totient φ(n) | 28080 |
| Square | 1835008569 |
| Cube | 78606262070253 |
| Square root | 206.971012 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 75 |
| Scientific notation | 4.2837 × |
42837 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand eight hundred and thirty-seven |
| Binary (base 2) | 1010011101010101 |
| Octal (base 8) | 123525 |
| Hexadecimal (base 16) | A755 |
| Base 3 | 2011202120 |
| As time | 42837 seconds = 11 h 53 min 57 s |
Is 42837 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 (42837 ÷ 3 = 14279) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 4) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42837 a prime number?
No. 42837 = 3 × 109 × 131, so it is divisible by 3.
What are the factors of 42837?
1, 3, 109, 131, 327, 393, 14279, 42837.
What is 42837 in binary?
1010011101010101 (hexadecimal A755, octal 123525).
What is the square root of 42837?
About 206.9710.
Is 42837 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 42837?
It is a composite number with 8 divisors.