It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 238 042 is not a prime number.
For example, 238 042 can be divided by 2: 238 042 / 2 = 119 021.
For 238 042 to be a prime number, it would have been required that 238 042 has only two divisors, i.e., itself and 1.
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238 042 is an even number, because it is evenly divisible by 2: 238 042 / 2 = 119 021.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 238 042 is about 487.895.
Thus, the square root of 238 042 is not an integer, and therefore 238 042 is not a square number.
The square of a number (here 238 042) is the result of the product of this number (238 042) by itself (i.e., 238 042 × 238 042); the square of 238 042 is sometimes called "raising 238 042 to the power 2", or "238 042 squared".
The square of 238 042 is 56 663 993 764 because 238 042 × 238 042 = 238 0422 = 56 663 993 764.
As a consequence, 238 042 is the square root of 56 663 993 764.
The multiples of 238 042 are all integers evenly divisible by 238 042, that is all numbers such that the remainder of the division by 238 042 is zero. There are infinitely many multiples of 238 042. The smallest multiples of 238 042 are: