The number 64842
64842 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 101 × 107. Divisors (16): 1, 2, 3, 6, 101, 107, 202, 214, 303, 321, 606, 642, 10807, 21614, 32421, 64842.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
64842 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
64842 is composite. Its prime factorisation is
- 3
The divisors add up to 132192; without 64842 itself that is 67350, so 64842 is abundant (67350 is more than 64842). Euler's totient φ(64842) = 21200 numbers up to 64842 share no factor with it.
- 4
The digits of 64842 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 73 steps to reach 1.
LaTeX source of the formulas on this page
\[ 64842 = 2 \times 3 \times 101 \times 107 \]
64842 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 132192 |
| Euler totient φ(n) | 21200 |
| Square | 4204484964 |
| Cube | 272627214035688 |
| Square root | 254.640924 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 73 |
| Scientific notation | 6.4842 × |
64842 in other forms
| Form | Value |
|---|---|
| In words | sixty-four thousand eight hundred and forty-two |
| Binary (base 2) | 1111110101001010 |
| Octal (base 8) | 176512 |
| Hexadecimal (base 16) | FD4A |
| Base 3 | 10021221120 |
| As time | 64842 seconds = 18 h 0 min 42 s |
Is 64842 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (64842 ÷ 2 = 32421) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (64842 ÷ 3 = 21614) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | 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 | Yes (64842 ÷ 6 = 10807) | 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 2) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 64842 a prime number?
No. 64842 = 2 × 3 × 101 × 107, so it is divisible by 2.
What are the factors of 64842?
1, 2, 3, 6, 101, 107, 202, 214, 303, 321, 606, 642, 10807, 21614, 32421, 64842.
What is 64842 in binary?
1111110101001010 (hexadecimal FD4A, octal 176512).
What is the square root of 64842?
About 254.6409.
Is 64842 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 64842?
It is a composite number with 16 divisors.