It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 2 426 242 is not a prime number.
For example, 2 426 242 can be divided by 2: 2 426 242 / 2 = 1 213 121.
For 2 426 242 to be a prime number, it would have been required that 2 426 242 has only two divisors, i.e., itself and 1.
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2 426 242 is an even number, because it is evenly divisible by 2: 2 426 242 / 2 = 1 213 121.
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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 2 426 242 is about 1 557.640.
Thus, the square root of 2 426 242 is not an integer, and therefore 2 426 242 is not a square number.
The square of a number (here 2 426 242) is the result of the product of this number (2 426 242) by itself (i.e., 2 426 242 × 2 426 242); the square of 2 426 242 is sometimes called "raising 2 426 242 to the power 2", or "2 426 242 squared".
The square of 2 426 242 is 5 886 650 242 564 because 2 426 242 × 2 426 242 = 2 426 2422 = 5 886 650 242 564.
As a consequence, 2 426 242 is the square root of 5 886 650 242 564.
The multiples of 2 426 242 are all integers evenly divisible by 2 426 242, that is all numbers such that the remainder of the division by 2 426 242 is zero. There are infinitely many multiples of 2 426 242. The smallest multiples of 2 426 242 are: