It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 7 102 644 is not a prime number.
For example, 7 102 644 can be divided by 2: 7 102 644 / 2 = 3 551 322.
For 7 102 644 to be a prime number, it would have been required that 7 102 644 has only two divisors, i.e., itself and 1.
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7 102 644 is an even number, because it is evenly divisible by 2: 7 102 644 / 2 = 3 551 322.
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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 7 102 644 is about 2 665.079.
Thus, the square root of 7 102 644 is not an integer, and therefore 7 102 644 is not a square number.
The square of a number (here 7 102 644) is the result of the product of this number (7 102 644) by itself (i.e., 7 102 644 × 7 102 644); the square of 7 102 644 is sometimes called "raising 7 102 644 to the power 2", or "7 102 644 squared".
The square of 7 102 644 is 50 447 551 790 736 because 7 102 644 × 7 102 644 = 7 102 6442 = 50 447 551 790 736.
As a consequence, 7 102 644 is the square root of 50 447 551 790 736.
The multiples of 7 102 644 are all integers evenly divisible by 7 102 644, that is all numbers such that the remainder of the division by 7 102 644 is zero. There are infinitely many multiples of 7 102 644. The smallest multiples of 7 102 644 are: