It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 501 798 is not a prime number.
For example, 501 798 can be divided by 2: 501 798 / 2 = 250 899.
For 501 798 to be a prime number, it would have been required that 501 798 has only two divisors, i.e., itself and 1.
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501 798 is an even number, because it is evenly divisible by 2: 501 798 / 2 = 250 899.
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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 501 798 is about 708.377.
Thus, the square root of 501 798 is not an integer, and therefore 501 798 is not a square number.
The square of a number (here 501 798) is the result of the product of this number (501 798) by itself (i.e., 501 798 × 501 798); the square of 501 798 is sometimes called "raising 501 798 to the power 2", or "501 798 squared".
The square of 501 798 is 251 801 232 804 because 501 798 × 501 798 = 501 7982 = 251 801 232 804.
As a consequence, 501 798 is the square root of 251 801 232 804.
The multiples of 501 798 are all integers evenly divisible by 501 798, that is all numbers such that the remainder of the division by 501 798 is zero. There are infinitely many multiples of 501 798. The smallest multiples of 501 798 are: