The number 42755
42755 is a composite number with 8 divisors. Its prime factorisation is 5 × 17 × 503. Divisors (8): 1, 5, 17, 85, 503, 2515, 8551, 42755.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42755 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42755 is composite. Its prime factorisation is
- 3
The divisors add up to 54432; without 42755 itself that is 11677, so 42755 is deficient (11677 is less than 42755). Euler's totient φ(42755) = 32128 numbers up to 42755 share no factor with it.
- 4
The digits of 42755 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42755 = 5 \times 17 \times 503 \]
42755 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 54432 |
| Euler totient φ(n) | 32128 |
| Square | 1827990025 |
| Cube | 78155713518875 |
| Square root | 206.772822 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2755 × |
42755 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand seven hundred and fifty-five |
| Binary (base 2) | 1010011100000011 |
| Octal (base 8) | 123403 |
| Hexadecimal (base 16) | A703 |
| Base 3 | 2011122112 |
| As time | 42755 seconds = 11 h 52 min 35 s |
Is 42755 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 | No (remainder 2) | 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 | Yes (42755 ÷ 5 = 8551) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | 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 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42755 a prime number?
No. 42755 = 5 × 17 × 503, so it is divisible by 5.
What are the factors of 42755?
1, 5, 17, 85, 503, 2515, 8551, 42755.
What is 42755 in binary?
1010011100000011 (hexadecimal A703, octal 123403).
What is the square root of 42755?
About 206.7728.
Is 42755 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 42755?
It is a composite number with 8 divisors.