It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 242 is not a prime number.
For example, 240 242 can be divided by 2: 240 242 / 2 = 120 121.
For 240 242 to be a prime number, it would have been required that 240 242 has only two divisors, i.e., itself and 1.
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240 242 is an even number, because it is evenly divisible by 2: 240 242 / 2 = 120 121.
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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 240 242 is about 490.145.
Thus, the square root of 240 242 is not an integer, and therefore 240 242 is not a square number.
The square of a number (here 240 242) is the result of the product of this number (240 242) by itself (i.e., 240 242 × 240 242); the square of 240 242 is sometimes called "raising 240 242 to the power 2", or "240 242 squared".
The square of 240 242 is 57 716 218 564 because 240 242 × 240 242 = 240 2422 = 57 716 218 564.
As a consequence, 240 242 is the square root of 57 716 218 564.
The multiples of 240 242 are all integers evenly divisible by 240 242, that is all numbers such that the remainder of the division by 240 242 is zero. There are infinitely many multiples of 240 242. The smallest multiples of 240 242 are: