It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 509 486 is not a prime number.
For example, 509 486 can be divided by 2: 509 486 / 2 = 254 743.
For 509 486 to be a prime number, it would have been required that 509 486 has only two divisors, i.e., itself and 1.
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509 486 is an even number, because it is evenly divisible by 2: 509 486 / 2 = 254 743.
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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 509 486 is about 713.783.
Thus, the square root of 509 486 is not an integer, and therefore 509 486 is not a square number.
The square of a number (here 509 486) is the result of the product of this number (509 486) by itself (i.e., 509 486 × 509 486); the square of 509 486 is sometimes called "raising 509 486 to the power 2", or "509 486 squared".
The square of 509 486 is 259 575 984 196 because 509 486 × 509 486 = 509 4862 = 259 575 984 196.
As a consequence, 509 486 is the square root of 259 575 984 196.
The multiples of 509 486 are all integers evenly divisible by 509 486, that is all numbers such that the remainder of the division by 509 486 is zero. There are infinitely many multiples of 509 486. The smallest multiples of 509 486 are: