It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 800 504 is not a prime number.
For example, 800 504 can be divided by 2: 800 504 / 2 = 400 252.
For 800 504 to be a prime number, it would have been required that 800 504 has only two divisors, i.e., itself and 1.
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800 504 is an even number, because it is evenly divisible by 2: 800 504 / 2 = 400 252.
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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 800 504 is about 894.709.
Thus, the square root of 800 504 is not an integer, and therefore 800 504 is not a square number.
The square of a number (here 800 504) is the result of the product of this number (800 504) by itself (i.e., 800 504 × 800 504); the square of 800 504 is sometimes called "raising 800 504 to the power 2", or "800 504 squared".
The square of 800 504 is 640 806 654 016 because 800 504 × 800 504 = 800 5042 = 640 806 654 016.
As a consequence, 800 504 is the square root of 640 806 654 016.
The multiples of 800 504 are all integers evenly divisible by 800 504, that is all numbers such that the remainder of the division by 800 504 is zero. There are infinitely many multiples of 800 504. The smallest multiples of 800 504 are: