It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 509 242 042 is not a prime number.
For example, 509 242 042 can be divided by 2: 509 242 042 / 2 = 254 621 021.
For 509 242 042 to be a prime number, it would have been required that 509 242 042 has only two divisors, i.e., itself and 1.
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509 242 042 is an even number, because it is evenly divisible by 2: 509 242 042 / 2 = 254 621 021.
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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 509 242 042 is about 22 566.392.
Thus, the square root of 509 242 042 is not an integer, and therefore 509 242 042 is not a square number.
The square of a number (here 509 242 042) is the result of the product of this number (509 242 042) by itself (i.e., 509 242 042 × 509 242 042); the square of 509 242 042 is sometimes called "raising 509 242 042 to the power 2", or "509 242 042 squared".
The square of 509 242 042 is 259 327 457 340 329 760 because 509 242 042 × 509 242 042 = 509 242 0422 = 259 327 457 340 329 760.
As a consequence, 509 242 042 is the square root of 259 327 457 340 329 760.
509 242 042 is a number with 9 digits.
The multiples of 509 242 042 are all integers evenly divisible by 509 242 042, that is all numbers such that the remainder of the division by 509 242 042 is zero. There are infinitely many multiples of 509 242 042. The smallest multiples of 509 242 042 are: