It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 424 342 is not a prime number.
For example, 424 342 can be divided by 2: 424 342 / 2 = 212 171.
For 424 342 to be a prime number, it would have been required that 424 342 has only two divisors, i.e., itself and 1.
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424 342 is an even number, because it is evenly divisible by 2: 424 342 / 2 = 212 171.
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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 424 342 is about 651.415.
Thus, the square root of 424 342 is not an integer, and therefore 424 342 is not a square number.
The square of a number (here 424 342) is the result of the product of this number (424 342) by itself (i.e., 424 342 × 424 342); the square of 424 342 is sometimes called "raising 424 342 to the power 2", or "424 342 squared".
The square of 424 342 is 180 066 132 964 because 424 342 × 424 342 = 424 3422 = 180 066 132 964.
As a consequence, 424 342 is the square root of 180 066 132 964.
The multiples of 424 342 are all integers evenly divisible by 424 342, that is all numbers such that the remainder of the division by 424 342 is zero. There are infinitely many multiples of 424 342. The smallest multiples of 424 342 are: