It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 574 is not a prime number.
For example, 397 574 can be divided by 2: 397 574 / 2 = 198 787.
For 397 574 to be a prime number, it would have been required that 397 574 has only two divisors, i.e., itself and 1.
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397 574 is an even number, because it is evenly divisible by 2: 397 574 / 2 = 198 787.
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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 397 574 is about 630.535.
Thus, the square root of 397 574 is not an integer, and therefore 397 574 is not a square number.
The square of a number (here 397 574) is the result of the product of this number (397 574) by itself (i.e., 397 574 × 397 574); the square of 397 574 is sometimes called "raising 397 574 to the power 2", or "397 574 squared".
The square of 397 574 is 158 065 085 476 because 397 574 × 397 574 = 397 5742 = 158 065 085 476.
As a consequence, 397 574 is the square root of 158 065 085 476.
The multiples of 397 574 are all integers evenly divisible by 397 574, that is all numbers such that the remainder of the division by 397 574 is zero. There are infinitely many multiples of 397 574. The smallest multiples of 397 574 are: