It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 424 518 is not a prime number.
For example, 424 518 can be divided by 2: 424 518 / 2 = 212 259.
For 424 518 to be a prime number, it would have been required that 424 518 has only two divisors, i.e., itself and 1.
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424 518 is an even number, because it is evenly divisible by 2: 424 518 / 2 = 212 259.
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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 424 518 is about 651.550.
Thus, the square root of 424 518 is not an integer, and therefore 424 518 is not a square number.
The square of a number (here 424 518) is the result of the product of this number (424 518) by itself (i.e., 424 518 × 424 518); the square of 424 518 is sometimes called "raising 424 518 to the power 2", or "424 518 squared".
The square of 424 518 is 180 215 532 324 because 424 518 × 424 518 = 424 5182 = 180 215 532 324.
As a consequence, 424 518 is the square root of 180 215 532 324.
The multiples of 424 518 are all integers evenly divisible by 424 518, that is all numbers such that the remainder of the division by 424 518 is zero. There are infinitely many multiples of 424 518. The smallest multiples of 424 518 are: