The number 42358
42358 is a composite number with 4 divisors. Its prime factorisation is 2 × 21179. Divisors (4): 1, 2, 21179, 42358.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42358: a semiprime: 2 × 21179, the product of two primes.
- 2
42358 is composite. Its prime factorisation is
- 3
The divisors add up to 63540; without 42358 itself that is 21182, so 42358 is deficient (21182 is less than 42358). Euler's totient φ(42358) = 21178 numbers up to 42358 share no factor with it.
- 4
The digits of 42358 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 119 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42358 = 2 \times 21179 \]
42358 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63540 |
| Euler totient φ(n) | 21178 |
| Square | 1794200164 |
| Cube | 75998730546712 |
| Square root | 205.810593 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 119 |
| Scientific notation | 4.2358 × |
42358 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and fifty-eight |
| Binary (base 2) | 1010010101110110 |
| Octal (base 8) | 122566 |
| Hexadecimal (base 16) | A576 |
| Base 3 | 2011002211 |
| As time | 42358 seconds = 11 h 45 min 58 s |
Is 42358 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42358 ÷ 2 = 21179) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | 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 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42358 a prime number?
No. 42358 = 2 × 21179, so it is divisible by 2.
What are the factors of 42358?
1, 2, 21179, 42358.
What is 42358 in binary?
1010010101110110 (hexadecimal A576, octal 122566).
What is the square root of 42358?
About 205.8106.
Is 42358 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 42358?
42358 is a semiprime: 2 × 21179, the product of two primes.