It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 526 is not a prime number.
For example, 264 526 can be divided by 2: 264 526 / 2 = 132 263.
For 264 526 to be a prime number, it would have been required that 264 526 has only two divisors, i.e., itself and 1.
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264 526 is an even number, because it is evenly divisible by 2: 264 526 / 2 = 132 263.
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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 264 526 is about 514.321.
Thus, the square root of 264 526 is not an integer, and therefore 264 526 is not a square number.
The square of a number (here 264 526) is the result of the product of this number (264 526) by itself (i.e., 264 526 × 264 526); the square of 264 526 is sometimes called "raising 264 526 to the power 2", or "264 526 squared".
The square of 264 526 is 69 974 004 676 because 264 526 × 264 526 = 264 5262 = 69 974 004 676.
As a consequence, 264 526 is the square root of 69 974 004 676.
The multiples of 264 526 are all integers evenly divisible by 264 526, that is all numbers such that the remainder of the division by 264 526 is zero. There are infinitely many multiples of 264 526. The smallest multiples of 264 526 are: