The number 42495
42495 is a composite number with 8 divisors. Its prime factorisation is 3 × 5 × 2833. Divisors (8): 1, 3, 5, 15, 2833, 8499, 14165, 42495.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42495 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42495 is composite. Its prime factorisation is
- 3
The divisors add up to 68016; without 42495 itself that is 25521, so 42495 is deficient (25521 is less than 42495). Euler's totient φ(42495) = 22656 numbers up to 42495 share no factor with it.
- 4
The digits of 42495 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 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42495 = 3 \times 5 \times 2833 \]
42495 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 68016 |
| Euler totient φ(n) | 22656 |
| Square | 1805825025 |
| Cube | 76738534437375 |
| Square root | 206.143154 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.2495 × |
42495 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand four hundred and ninety-five |
| Binary (base 2) | 1010010111111111 |
| Octal (base 8) | 122777 |
| Hexadecimal (base 16) | A5FF |
| Base 3 | 2011021220 |
| As time | 42495 seconds = 11 h 48 min 15 s |
Is 42495 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 (42495 ÷ 3 = 14165) | 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 (42495 ÷ 5 = 8499) | 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 7) | 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 5) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42495 a prime number?
No. 42495 = 3 × 5 × 2833, so it is divisible by 3.
What are the factors of 42495?
1, 3, 5, 15, 2833, 8499, 14165, 42495.
What is 42495 in binary?
1010010111111111 (hexadecimal A5FF, octal 122777).
What is the square root of 42495?
About 206.1432.
Is 42495 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 42495?
It is a composite number with 8 divisors.