It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 4 398 242 is not a prime number.
For example, 4 398 242 can be divided by 2: 4 398 242 / 2 = 2 199 121.
For 4 398 242 to be a prime number, it would have been required that 4 398 242 has only two divisors, i.e., itself and 1.
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4 398 242 is an even number, because it is evenly divisible by 2: 4 398 242 / 2 = 2 199 121.
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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 4 398 242 is about 2 097.199.
Thus, the square root of 4 398 242 is not an integer, and therefore 4 398 242 is not a square number.
The square of a number (here 4 398 242) is the result of the product of this number (4 398 242) by itself (i.e., 4 398 242 × 4 398 242); the square of 4 398 242 is sometimes called "raising 4 398 242 to the power 2", or "4 398 242 squared".
The square of 4 398 242 is 19 344 532 690 564 because 4 398 242 × 4 398 242 = 4 398 2422 = 19 344 532 690 564.
As a consequence, 4 398 242 is the square root of 19 344 532 690 564.
The multiples of 4 398 242 are all integers evenly divisible by 4 398 242, that is all numbers such that the remainder of the division by 4 398 242 is zero. There are infinitely many multiples of 4 398 242. The smallest multiples of 4 398 242 are: