It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 1 084 021 is not a prime number.
For example, 1 084 021 can be divided by 443: 1 084 021 / 443 = 2 447.
For 1 084 021 to be a prime number, it would have been required that 1 084 021 has only two divisors, i.e., itself and 1.
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1 084 021 is an odd number, because it is not evenly divisible by 2.
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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 1 084 021 is about 1 041.163.
Thus, the square root of 1 084 021 is not an integer, and therefore 1 084 021 is not a square number.
The square of a number (here 1 084 021) is the result of the product of this number (1 084 021) by itself (i.e., 1 084 021 × 1 084 021); the square of 1 084 021 is sometimes called "raising 1 084 021 to the power 2", or "1 084 021 squared".
The square of 1 084 021 is 1 175 101 528 441 because 1 084 021 × 1 084 021 = 1 084 0212 = 1 175 101 528 441.
As a consequence, 1 084 021 is the square root of 1 175 101 528 441.
The multiples of 1 084 021 are all integers evenly divisible by 1 084 021, that is all numbers such that the remainder of the division by 1 084 021 is zero. There are infinitely many multiples of 1 084 021. The smallest multiples of 1 084 021 are: