The number 42747
42747 is a composite number with 4 divisors. Its prime factorisation is 3 × 14249. Divisors (4): 1, 3, 14249, 42747.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42747: a semiprime: 3 × 14249, the product of two primes.
- 2
42747 is composite. Its prime factorisation is
- 3
The divisors add up to 57000; without 42747 itself that is 14253, so 42747 is deficient (14253 is less than 42747). Euler's totient φ(42747) = 28496 numbers up to 42747 share no factor with it.
- 4
The digits of 42747 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 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42747 = 3 \times 14249 \]
42747 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57000 |
| Euler totient φ(n) | 28496 |
| Square | 1827306009 |
| Cube | 78111849966723 |
| Square root | 206.753476 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.2747 × |
42747 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand seven hundred and forty-seven |
| Binary (base 2) | 1010011011111011 |
| Octal (base 8) | 123373 |
| Hexadecimal (base 16) | A6FB |
| Base 3 | 2011122020 |
| As time | 42747 seconds = 11 h 52 min 27 s |
Is 42747 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 (42747 ÷ 3 = 14249) | 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 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 5) | 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 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 1) | 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 42747 a prime number?
No. 42747 = 3 × 14249, so it is divisible by 3.
What are the factors of 42747?
1, 3, 14249, 42747.
What is 42747 in binary?
1010011011111011 (hexadecimal A6FB, octal 123373).
What is the square root of 42747?
About 206.7535.
Is 42747 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 42747?
42747 is a semiprime: 3 × 14249, the product of two primes.