It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 747 742 is not a prime number.
For example, 747 742 can be divided by 2: 747 742 / 2 = 373 871.
For 747 742 to be a prime number, it would have been required that 747 742 has only two divisors, i.e., itself and 1.
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747 742 is an even number, because it is evenly divisible by 2: 747 742 / 2 = 373 871.
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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 747 742 is about 864.721.
Thus, the square root of 747 742 is not an integer, and therefore 747 742 is not a square number.
The square of a number (here 747 742) is the result of the product of this number (747 742) by itself (i.e., 747 742 × 747 742); the square of 747 742 is sometimes called "raising 747 742 to the power 2", or "747 742 squared".
The square of 747 742 is 559 118 098 564 because 747 742 × 747 742 = 747 7422 = 559 118 098 564.
As a consequence, 747 742 is the square root of 559 118 098 564.
The multiples of 747 742 are all integers evenly divisible by 747 742, that is all numbers such that the remainder of the division by 747 742 is zero. There are infinitely many multiples of 747 742. The smallest multiples of 747 742 are: