It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 474 is not a prime number.
For example, 491 474 can be divided by 2: 491 474 / 2 = 245 737.
For 491 474 to be a prime number, it would have been required that 491 474 has only two divisors, i.e., itself and 1.
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491 474 is an even number, because it is evenly divisible by 2: 491 474 / 2 = 245 737.
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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 491 474 is about 701.052.
Thus, the square root of 491 474 is not an integer, and therefore 491 474 is not a square number.
The square of a number (here 491 474) is the result of the product of this number (491 474) by itself (i.e., 491 474 × 491 474); the square of 491 474 is sometimes called "raising 491 474 to the power 2", or "491 474 squared".
The square of 491 474 is 241 546 692 676 because 491 474 × 491 474 = 491 4742 = 241 546 692 676.
As a consequence, 491 474 is the square root of 241 546 692 676.
The multiples of 491 474 are all integers evenly divisible by 491 474, that is all numbers such that the remainder of the division by 491 474 is zero. There are infinitely many multiples of 491 474. The smallest multiples of 491 474 are: