It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 512 is not a prime number.
For example, 490 512 can be divided by 2: 490 512 / 2 = 245 256.
For 490 512 to be a prime number, it would have been required that 490 512 has only two divisors, i.e., itself and 1.
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490 512 is an even number, because it is evenly divisible by 2: 490 512 / 2 = 245 256.
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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 490 512 is about 700.366.
Thus, the square root of 490 512 is not an integer, and therefore 490 512 is not a square number.
The square of a number (here 490 512) is the result of the product of this number (490 512) by itself (i.e., 490 512 × 490 512); the square of 490 512 is sometimes called "raising 490 512 to the power 2", or "490 512 squared".
The square of 490 512 is 240 602 022 144 because 490 512 × 490 512 = 490 5122 = 240 602 022 144.
As a consequence, 490 512 is the square root of 240 602 022 144.
The multiples of 490 512 are all integers evenly divisible by 490 512, that is all numbers such that the remainder of the division by 490 512 is zero. There are infinitely many multiples of 490 512. The smallest multiples of 490 512 are: