It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 604 804 is not a prime number.
For example, 604 804 can be divided by 2: 604 804 / 2 = 302 402.
For 604 804 to be a prime number, it would have been required that 604 804 has only two divisors, i.e., itself and 1.
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604 804 is an even number, because it is evenly divisible by 2: 604 804 / 2 = 302 402.
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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 604 804 is about 777.691.
Thus, the square root of 604 804 is not an integer, and therefore 604 804 is not a square number.
The square of a number (here 604 804) is the result of the product of this number (604 804) by itself (i.e., 604 804 × 604 804); the square of 604 804 is sometimes called "raising 604 804 to the power 2", or "604 804 squared".
The square of 604 804 is 365 787 878 416 because 604 804 × 604 804 = 604 8042 = 365 787 878 416.
As a consequence, 604 804 is the square root of 365 787 878 416.
The multiples of 604 804 are all integers evenly divisible by 604 804, that is all numbers such that the remainder of the division by 604 804 is zero. There are infinitely many multiples of 604 804. The smallest multiples of 604 804 are: