It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 4 000 002 is not a prime number.
For example, 4 000 002 can be divided by 2: 4 000 002 / 2 = 2 000 001.
For 4 000 002 to be a prime number, it would have been required that 4 000 002 has only two divisors, i.e., itself and 1.
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4 000 002 is an even number, because it is evenly divisible by 2: 4 000 002 / 2 = 2 000 001.
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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 4 000 002 is about 2 000.000.
Thus, the square root of 4 000 002 is not an integer, and therefore 4 000 002 is not a square number.
The square of a number (here 4 000 002) is the result of the product of this number (4 000 002) by itself (i.e., 4 000 002 × 4 000 002); the square of 4 000 002 is sometimes called "raising 4 000 002 to the power 2", or "4 000 002 squared".
The square of 4 000 002 is 16 000 016 000 004 because 4 000 002 × 4 000 002 = 4 000 0022 = 16 000 016 000 004.
As a consequence, 4 000 002 is the square root of 16 000 016 000 004.
The multiples of 4 000 002 are all integers evenly divisible by 4 000 002, that is all numbers such that the remainder of the division by 4 000 002 is zero. There are infinitely many multiples of 4 000 002. The smallest multiples of 4 000 002 are: