It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 424 416 is not a prime number.
For example, 424 416 can be divided by 2: 424 416 / 2 = 212 208.
For 424 416 to be a prime number, it would have been required that 424 416 has only two divisors, i.e., itself and 1.
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424 416 is an even number, because it is evenly divisible by 2: 424 416 / 2 = 212 208.
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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 424 416 is about 651.472.
Thus, the square root of 424 416 is not an integer, and therefore 424 416 is not a square number.
The square of a number (here 424 416) is the result of the product of this number (424 416) by itself (i.e., 424 416 × 424 416); the square of 424 416 is sometimes called "raising 424 416 to the power 2", or "424 416 squared".
The square of 424 416 is 180 128 941 056 because 424 416 × 424 416 = 424 4162 = 180 128 941 056.
As a consequence, 424 416 is the square root of 180 128 941 056.
The multiples of 424 416 are all integers evenly divisible by 424 416, that is all numbers such that the remainder of the division by 424 416 is zero. There are infinitely many multiples of 424 416. The smallest multiples of 424 416 are: