It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 122 is not a prime number.
For example, 397 122 can be divided by 2: 397 122 / 2 = 198 561.
For 397 122 to be a prime number, it would have been required that 397 122 has only two divisors, i.e., itself and 1.
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397 122 is an even number, because it is evenly divisible by 2: 397 122 / 2 = 198 561.
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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 397 122 is about 630.176.
Thus, the square root of 397 122 is not an integer, and therefore 397 122 is not a square number.
The square of a number (here 397 122) is the result of the product of this number (397 122) by itself (i.e., 397 122 × 397 122); the square of 397 122 is sometimes called "raising 397 122 to the power 2", or "397 122 squared".
The square of 397 122 is 157 705 882 884 because 397 122 × 397 122 = 397 1222 = 157 705 882 884.
As a consequence, 397 122 is the square root of 157 705 882 884.
The multiples of 397 122 are all integers evenly divisible by 397 122, that is all numbers such that the remainder of the division by 397 122 is zero. There are infinitely many multiples of 397 122. The smallest multiples of 397 122 are: