The number 85242
85242 is a composite number with 8 divisors. Its prime factorisation is 2 × 3 × 14207. Divisors (8): 1, 2, 3, 6, 14207, 28414, 42621, 85242.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
85242 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
85242 is composite. Its prime factorisation is
- 3
The divisors add up to 170496; without 85242 itself that is 85254, so 85242 is abundant (85254 is more than 85242). Euler's totient φ(85242) = 28412 numbers up to 85242 share no factor with it.
- 4
The digits of 85242 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 151 steps to reach 1.
LaTeX source of the formulas on this page
\[ 85242 = 2 \times 3 \times 14207 \]
85242 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 170496 |
| Euler totient φ(n) | 28412 |
| Square | 7266198564 |
| Cube | 619385297992488 |
| Square root | 291.962326 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 151 |
| Scientific notation | 8.5242 × |
85242 in other forms
| Form | Value |
|---|---|
| In words | eighty-five thousand two hundred and forty-two |
| Binary (base 2) | 10100110011111010 |
| Octal (base 8) | 246372 |
| Hexadecimal (base 16) | 14CFA |
| Base 3 | 11022221010 |
| As time | 85242 seconds = 23 h 40 min 42 s |
Is 85242 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (85242 ÷ 2 = 42621) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (85242 ÷ 3 = 28414) | 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 (85242 ÷ 6 = 14207) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 3) | 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 3) | 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 85242 a prime number?
No. 85242 = 2 × 3 × 14207, so it is divisible by 2.
What are the factors of 85242?
1, 2, 3, 6, 14207, 28414, 42621, 85242.
What is 85242 in binary?
10100110011111010 (hexadecimal 14CFA, octal 246372).
What is the square root of 85242?
About 291.9623.
Is 85242 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 85242?
It is a composite number with 8 divisors.