It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 321 498 is not a prime number.
For example, 321 498 can be divided by 2: 321 498 / 2 = 160 749.
For 321 498 to be a prime number, it would have been required that 321 498 has only two divisors, i.e., itself and 1.
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321 498 is an even number, because it is evenly divisible by 2: 321 498 / 2 = 160 749.
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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 321 498 is about 567.008.
Thus, the square root of 321 498 is not an integer, and therefore 321 498 is not a square number.
The square of a number (here 321 498) is the result of the product of this number (321 498) by itself (i.e., 321 498 × 321 498); the square of 321 498 is sometimes called "raising 321 498 to the power 2", or "321 498 squared".
The square of 321 498 is 103 360 964 004 because 321 498 × 321 498 = 321 4982 = 103 360 964 004.
As a consequence, 321 498 is the square root of 103 360 964 004.
The multiples of 321 498 are all integers evenly divisible by 321 498, that is all numbers such that the remainder of the division by 321 498 is zero. There are infinitely many multiples of 321 498. The smallest multiples of 321 498 are: