It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 402 is not a prime number.
For example, 491 402 can be divided by 2: 491 402 / 2 = 245 701.
For 491 402 to be a prime number, it would have been required that 491 402 has only two divisors, i.e., itself and 1.
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491 402 is an even number, because it is evenly divisible by 2: 491 402 / 2 = 245 701.
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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 491 402 is about 701.001.
Thus, the square root of 491 402 is not an integer, and therefore 491 402 is not a square number.
The square of a number (here 491 402) is the result of the product of this number (491 402) by itself (i.e., 491 402 × 491 402); the square of 491 402 is sometimes called "raising 491 402 to the power 2", or "491 402 squared".
The square of 491 402 is 241 475 925 604 because 491 402 × 491 402 = 491 4022 = 241 475 925 604.
As a consequence, 491 402 is the square root of 241 475 925 604.
The multiples of 491 402 are all integers evenly divisible by 491 402, that is all numbers such that the remainder of the division by 491 402 is zero. There are infinitely many multiples of 491 402. The smallest multiples of 491 402 are: