The number 42365
42365 is a composite number with 8 divisors. Its prime factorisation is 5 × 37 × 229. Divisors (8): 1, 5, 37, 185, 229, 1145, 8473, 42365.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42365 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42365 is composite. Its prime factorisation is
- 3
The divisors add up to 52440; without 42365 itself that is 10075, so 42365 is deficient (10075 is less than 42365). Euler's totient φ(42365) = 32832 numbers up to 42365 share no factor with it.
- 4
The digits of 42365 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42365 = 5 \times 37 \times 229 \]
42365 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 52440 |
| Euler totient φ(n) | 32832 |
| Square | 1794793225 |
| Cube | 76036414977125 |
| Square root | 205.827598 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.2365 × |
42365 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and sixty-five |
| Binary (base 2) | 1010010101111101 |
| Octal (base 8) | 122575 |
| Hexadecimal (base 16) | A57D |
| Base 3 | 2011010002 |
| As time | 42365 seconds = 11 h 46 min 5 s |
Is 42365 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (42365 ÷ 5 = 8473) | 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 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42365 a prime number?
No. 42365 = 5 × 37 × 229, so it is divisible by 5.
What are the factors of 42365?
1, 5, 37, 185, 229, 1145, 8473, 42365.
What is 42365 in binary?
1010010101111101 (hexadecimal A57D, octal 122575).
What is the square root of 42365?
About 205.8276.
Is 42365 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42365?
It is a composite number with 8 divisors.