It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 242 664 is not a prime number.
For example, 242 664 can be divided by 2: 242 664 / 2 = 121 332.
For 242 664 to be a prime number, it would have been required that 242 664 has only two divisors, i.e., itself and 1.
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242 664 is an even number, because it is evenly divisible by 2: 242 664 / 2 = 121 332.
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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 242 664 is about 492.609.
Thus, the square root of 242 664 is not an integer, and therefore 242 664 is not a square number.
The square of a number (here 242 664) is the result of the product of this number (242 664) by itself (i.e., 242 664 × 242 664); the square of 242 664 is sometimes called "raising 242 664 to the power 2", or "242 664 squared".
The square of 242 664 is 58 885 816 896 because 242 664 × 242 664 = 242 6642 = 58 885 816 896.
As a consequence, 242 664 is the square root of 58 885 816 896.
The multiples of 242 664 are all integers evenly divisible by 242 664, that is all numbers such that the remainder of the division by 242 664 is zero. There are infinitely many multiples of 242 664. The smallest multiples of 242 664 are: