It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 492 138 is not a prime number.
For example, 492 138 can be divided by 2: 492 138 / 2 = 246 069.
For 492 138 to be a prime number, it would have been required that 492 138 has only two divisors, i.e., itself and 1.
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492 138 is an even number, because it is evenly divisible by 2: 492 138 / 2 = 246 069.
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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 492 138 is about 701.525.
Thus, the square root of 492 138 is not an integer, and therefore 492 138 is not a square number.
The square of a number (here 492 138) is the result of the product of this number (492 138) by itself (i.e., 492 138 × 492 138); the square of 492 138 is sometimes called "raising 492 138 to the power 2", or "492 138 squared".
The square of 492 138 is 242 199 811 044 because 492 138 × 492 138 = 492 1382 = 242 199 811 044.
As a consequence, 492 138 is the square root of 242 199 811 044.
The multiples of 492 138 are all integers evenly divisible by 492 138, that is all numbers such that the remainder of the division by 492 138 is zero. There are infinitely many multiples of 492 138. The smallest multiples of 492 138 are: