It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 342 is not a prime number.
For example, 490 342 can be divided by 2: 490 342 / 2 = 245 171.
For 490 342 to be a prime number, it would have been required that 490 342 has only two divisors, i.e., itself and 1.
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490 342 is an even number, because it is evenly divisible by 2: 490 342 / 2 = 245 171.
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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 490 342 is about 700.244.
Thus, the square root of 490 342 is not an integer, and therefore 490 342 is not a square number.
The square of a number (here 490 342) is the result of the product of this number (490 342) by itself (i.e., 490 342 × 490 342); the square of 490 342 is sometimes called "raising 490 342 to the power 2", or "490 342 squared".
The square of 490 342 is 240 435 276 964 because 490 342 × 490 342 = 490 3422 = 240 435 276 964.
As a consequence, 490 342 is the square root of 240 435 276 964.
The multiples of 490 342 are all integers evenly divisible by 490 342, that is all numbers such that the remainder of the division by 490 342 is zero. There are infinitely many multiples of 490 342. The smallest multiples of 490 342 are: