It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 997 402 is not a prime number.
For example, 997 402 can be divided by 2: 997 402 / 2 = 498 701.
For 997 402 to be a prime number, it would have been required that 997 402 has only two divisors, i.e., itself and 1.
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997 402 is an even number, because it is evenly divisible by 2: 997 402 / 2 = 498 701.
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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 997 402 is about 998.700.
Thus, the square root of 997 402 is not an integer, and therefore 997 402 is not a square number.
The square of a number (here 997 402) is the result of the product of this number (997 402) by itself (i.e., 997 402 × 997 402); the square of 997 402 is sometimes called "raising 997 402 to the power 2", or "997 402 squared".
The square of 997 402 is 994 810 749 604 because 997 402 × 997 402 = 997 4022 = 994 810 749 604.
As a consequence, 997 402 is the square root of 994 810 749 604.
The multiples of 997 402 are all integers evenly divisible by 997 402, that is all numbers such that the remainder of the division by 997 402 is zero. There are infinitely many multiples of 997 402. The smallest multiples of 997 402 are: