It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 258 958 is not a prime number.
For example, 258 958 can be divided by 2: 258 958 / 2 = 129 479.
For 258 958 to be a prime number, it would have been required that 258 958 has only two divisors, i.e., itself and 1.
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258 958 is an even number, because it is evenly divisible by 2: 258 958 / 2 = 129 479.
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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 258 958 is about 508.879.
Thus, the square root of 258 958 is not an integer, and therefore 258 958 is not a square number.
The square of a number (here 258 958) is the result of the product of this number (258 958) by itself (i.e., 258 958 × 258 958); the square of 258 958 is sometimes called "raising 258 958 to the power 2", or "258 958 squared".
The square of 258 958 is 67 059 245 764 because 258 958 × 258 958 = 258 9582 = 67 059 245 764.
As a consequence, 258 958 is the square root of 67 059 245 764.
The multiples of 258 958 are all integers evenly divisible by 258 958, that is all numbers such that the remainder of the division by 258 958 is zero. There are infinitely many multiples of 258 958. The smallest multiples of 258 958 are: