It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 520 708 is not a prime number.
For example, 520 708 can be divided by 2: 520 708 / 2 = 260 354.
For 520 708 to be a prime number, it would have been required that 520 708 has only two divisors, i.e., itself and 1.
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520 708 is an even number, because it is evenly divisible by 2: 520 708 / 2 = 260 354.
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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 520 708 is about 721.601.
Thus, the square root of 520 708 is not an integer, and therefore 520 708 is not a square number.
The square of a number (here 520 708) is the result of the product of this number (520 708) by itself (i.e., 520 708 × 520 708); the square of 520 708 is sometimes called "raising 520 708 to the power 2", or "520 708 squared".
The square of 520 708 is 271 136 821 264 because 520 708 × 520 708 = 520 7082 = 271 136 821 264.
As a consequence, 520 708 is the square root of 271 136 821 264.
The multiples of 520 708 are all integers evenly divisible by 520 708, that is all numbers such that the remainder of the division by 520 708 is zero. There are infinitely many multiples of 520 708. The smallest multiples of 520 708 are: