The number 42946
42946 is a composite number with 8 divisors. Its prime factorisation is 2 × 109 × 197. Divisors (8): 1, 2, 109, 197, 218, 394, 21473, 42946.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42946 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42946 is composite. Its prime factorisation is
- 3
The divisors add up to 65340; without 42946 itself that is 22394, so 42946 is deficient (22394 is less than 42946). Euler's totient φ(42946) = 21168 numbers up to 42946 share no factor with it.
- 4
The digits of 42946 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42946 = 2 \times 109 \times 197 \]
42946 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 65340 |
| Euler totient φ(n) | 21168 |
| Square | 1844358916 |
| Cube | 79207838006536 |
| Square root | 207.234167 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2946 × |
42946 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and forty-six |
| Binary (base 2) | 1010011111000010 |
| Octal (base 8) | 123702 |
| Hexadecimal (base 16) | A7C2 |
| Base 3 | 2011220121 |
| As time | 42946 seconds = 11 h 55 min 46 s |
Is 42946 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42946 ÷ 2 = 21473) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42946 a prime number?
No. 42946 = 2 × 109 × 197, so it is divisible by 2.
What are the factors of 42946?
1, 2, 109, 197, 218, 394, 21473, 42946.
What is 42946 in binary?
1010011111000010 (hexadecimal A7C2, octal 123702).
What is the square root of 42946?
About 207.2342.
Is 42946 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 42946?
It is a composite number with 8 divisors.