It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 058 is not a prime number.
For example, 491 058 can be divided by 2: 491 058 / 2 = 245 529.
For 491 058 to be a prime number, it would have been required that 491 058 has only two divisors, i.e., itself and 1.
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491 058 is an even number, because it is evenly divisible by 2: 491 058 / 2 = 245 529.
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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 491 058 is about 700.755.
Thus, the square root of 491 058 is not an integer, and therefore 491 058 is not a square number.
The square of a number (here 491 058) is the result of the product of this number (491 058) by itself (i.e., 491 058 × 491 058); the square of 491 058 is sometimes called "raising 491 058 to the power 2", or "491 058 squared".
The square of 491 058 is 241 137 959 364 because 491 058 × 491 058 = 491 0582 = 241 137 959 364.
As a consequence, 491 058 is the square root of 241 137 959 364.
The multiples of 491 058 are all integers evenly divisible by 491 058, that is all numbers such that the remainder of the division by 491 058 is zero. There are infinitely many multiples of 491 058. The smallest multiples of 491 058 are: