It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 342 is not a prime number.
For example, 397 342 can be divided by 2: 397 342 / 2 = 198 671.
For 397 342 to be a prime number, it would have been required that 397 342 has only two divisors, i.e., itself and 1.
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397 342 is an even number, because it is evenly divisible by 2: 397 342 / 2 = 198 671.
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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 397 342 is about 630.351.
Thus, the square root of 397 342 is not an integer, and therefore 397 342 is not a square number.
The square of a number (here 397 342) is the result of the product of this number (397 342) by itself (i.e., 397 342 × 397 342); the square of 397 342 is sometimes called "raising 397 342 to the power 2", or "397 342 squared".
The square of 397 342 is 157 880 664 964 because 397 342 × 397 342 = 397 3422 = 157 880 664 964.
As a consequence, 397 342 is the square root of 157 880 664 964.
The multiples of 397 342 are all integers evenly divisible by 397 342, that is all numbers such that the remainder of the division by 397 342 is zero. There are infinitely many multiples of 397 342. The smallest multiples of 397 342 are: