It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 491 is not a prime number.
For example, 264 491 can be divided by 41: 264 491 / 41 = 6 451.
For 264 491 to be a prime number, it would have been required that 264 491 has only two divisors, i.e., itself and 1.
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264 491 is an odd number, because it is not evenly divisible by 2.
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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 264 491 is about 514.287.
Thus, the square root of 264 491 is not an integer, and therefore 264 491 is not a square number.
The square of a number (here 264 491) is the result of the product of this number (264 491) by itself (i.e., 264 491 × 264 491); the square of 264 491 is sometimes called "raising 264 491 to the power 2", or "264 491 squared".
The square of 264 491 is 69 955 489 081 because 264 491 × 264 491 = 264 4912 = 69 955 489 081.
As a consequence, 264 491 is the square root of 69 955 489 081.
The multiples of 264 491 are all integers evenly divisible by 264 491, that is all numbers such that the remainder of the division by 264 491 is zero. There are infinitely many multiples of 264 491. The smallest multiples of 264 491 are: