It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 7 420 174 is not a prime number.
For example, 7 420 174 can be divided by 2: 7 420 174 / 2 = 3 710 087.
For 7 420 174 to be a prime number, it would have been required that 7 420 174 has only two divisors, i.e., itself and 1.
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7 420 174 is an even number, because it is evenly divisible by 2: 7 420 174 / 2 = 3 710 087.
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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 7 420 174 is about 2 724.000.
Thus, the square root of 7 420 174 is not an integer, and therefore 7 420 174 is not a square number.
The square of a number (here 7 420 174) is the result of the product of this number (7 420 174) by itself (i.e., 7 420 174 × 7 420 174); the square of 7 420 174 is sometimes called "raising 7 420 174 to the power 2", or "7 420 174 squared".
The square of 7 420 174 is 55 058 982 190 276 because 7 420 174 × 7 420 174 = 7 420 1742 = 55 058 982 190 276.
As a consequence, 7 420 174 is the square root of 55 058 982 190 276.
The multiples of 7 420 174 are all integers evenly divisible by 7 420 174, that is all numbers such that the remainder of the division by 7 420 174 is zero. There are infinitely many multiples of 7 420 174. The smallest multiples of 7 420 174 are: