The number 42290
42290 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 4229. Divisors (8): 1, 2, 5, 10, 4229, 8458, 21145, 42290.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42290 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42290 is composite. Its prime factorisation is
- 3
The divisors add up to 76140; without 42290 itself that is 33850, so 42290 is deficient (33850 is less than 42290). Euler's totient φ(42290) = 16912 numbers up to 42290 share no factor with it.
- 4
The digits of 42290 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42290 = 2 \times 5 \times 4229 \]
42290 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 76140 |
| Euler totient φ(n) | 16912 |
| Square | 1788444100 |
| Cube | 75633300989000 |
| Square root | 205.645326 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.229 × |
42290 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand two hundred and ninety |
| Binary (base 2) | 1010010100110010 |
| Octal (base 8) | 122462 |
| Hexadecimal (base 16) | A532 |
| Base 3 | 2011000022 |
| As time | 42290 seconds = 11 h 44 min 50 s |
Is 42290 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42290 ÷ 2 = 21145) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (42290 ÷ 5 = 8458) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | 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 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (42290 ÷ 10 = 4229) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42290 a prime number?
No. 42290 = 2 × 5 × 4229, so it is divisible by 2.
What are the factors of 42290?
1, 2, 5, 10, 4229, 8458, 21145, 42290.
What is 42290 in binary?
1010010100110010 (hexadecimal A532, octal 122462).
What is the square root of 42290?
About 205.6453.
Is 42290 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 42290?
It is a composite number with 8 divisors.