It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 258 464 is not a prime number.
For example, 258 464 can be divided by 2: 258 464 / 2 = 129 232.
For 258 464 to be a prime number, it would have been required that 258 464 has only two divisors, i.e., itself and 1.
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258 464 is an even number, because it is evenly divisible by 2: 258 464 / 2 = 129 232.
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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 258 464 is about 508.394.
Thus, the square root of 258 464 is not an integer, and therefore 258 464 is not a square number.
The square of a number (here 258 464) is the result of the product of this number (258 464) by itself (i.e., 258 464 × 258 464); the square of 258 464 is sometimes called "raising 258 464 to the power 2", or "258 464 squared".
The square of 258 464 is 66 803 639 296 because 258 464 × 258 464 = 258 4642 = 66 803 639 296.
As a consequence, 258 464 is the square root of 66 803 639 296.
The multiples of 258 464 are all integers evenly divisible by 258 464, that is all numbers such that the remainder of the division by 258 464 is zero. There are infinitely many multiples of 258 464. The smallest multiples of 258 464 are: