It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 495 474 is not a prime number.
For example, 495 474 can be divided by 2: 495 474 / 2 = 247 737.
For 495 474 to be a prime number, it would have been required that 495 474 has only two divisors, i.e., itself and 1.
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495 474 is an even number, because it is evenly divisible by 2: 495 474 / 2 = 247 737.
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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 495 474 is about 703.899.
Thus, the square root of 495 474 is not an integer, and therefore 495 474 is not a square number.
The square of a number (here 495 474) is the result of the product of this number (495 474) by itself (i.e., 495 474 × 495 474); the square of 495 474 is sometimes called "raising 495 474 to the power 2", or "495 474 squared".
The square of 495 474 is 245 494 484 676 because 495 474 × 495 474 = 495 4742 = 245 494 484 676.
As a consequence, 495 474 is the square root of 245 494 484 676.
The multiples of 495 474 are all integers evenly divisible by 495 474, that is all numbers such that the remainder of the division by 495 474 is zero. There are infinitely many multiples of 495 474. The smallest multiples of 495 474 are: