It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 022 is not a prime number.
For example, 402 022 can be divided by 2: 402 022 / 2 = 201 011.
For 402 022 to be a prime number, it would have been required that 402 022 has only two divisors, i.e., itself and 1.
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402 022 is an even number, because it is evenly divisible by 2: 402 022 / 2 = 201 011.
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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 402 022 is about 634.052.
Thus, the square root of 402 022 is not an integer, and therefore 402 022 is not a square number.
The square of a number (here 402 022) is the result of the product of this number (402 022) by itself (i.e., 402 022 × 402 022); the square of 402 022 is sometimes called "raising 402 022 to the power 2", or "402 022 squared".
The square of 402 022 is 161 621 688 484 because 402 022 × 402 022 = 402 0222 = 161 621 688 484.
As a consequence, 402 022 is the square root of 161 621 688 484.
The multiples of 402 022 are all integers evenly divisible by 402 022, that is all numbers such that the remainder of the division by 402 022 is zero. There are infinitely many multiples of 402 022. The smallest multiples of 402 022 are: