The number 42549
42549 is a composite number with 8 divisors. Its prime factorisation is 3 × 13 × 1091. Divisors (8): 1, 3, 13, 39, 1091, 3273, 14183, 42549.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42549 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42549 is composite. Its prime factorisation is
- 3
The divisors add up to 61152; without 42549 itself that is 18603, so 42549 is deficient (18603 is less than 42549). Euler's totient φ(42549) = 26160 numbers up to 42549 share no factor with it.
- 4
The digits of 42549 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 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42549 = 3 \times 13 \times 1091 \]
42549 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 61152 |
| Euler totient φ(n) | 26160 |
| Square | 1810417401 |
| Cube | 77031449995149 |
| Square root | 206.274090 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2549 × |
42549 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand five hundred and forty-nine |
| Binary (base 2) | 1010011000110101 |
| Octal (base 8) | 123065 |
| Hexadecimal (base 16) | A635 |
| Base 3 | 2011100220 |
| As time | 42549 seconds = 11 h 49 min 9 s |
Is 42549 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 (42549 ÷ 3 = 14183) | 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 4) | 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 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 42549 a prime number?
No. 42549 = 3 × 13 × 1091, so it is divisible by 3.
What are the factors of 42549?
1, 3, 13, 39, 1091, 3273, 14183, 42549.
What is 42549 in binary?
1010011000110101 (hexadecimal A635, octal 123065).
What is the square root of 42549?
About 206.2741.
Is 42549 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 42549?
It is a composite number with 8 divisors.