It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 801 742 is not a prime number.
For example, 801 742 can be divided by 2: 801 742 / 2 = 400 871.
For 801 742 to be a prime number, it would have been required that 801 742 has only two divisors, i.e., itself and 1.
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801 742 is an even number, because it is evenly divisible by 2: 801 742 / 2 = 400 871.
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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 801 742 is about 895.400.
Thus, the square root of 801 742 is not an integer, and therefore 801 742 is not a square number.
The square of a number (here 801 742) is the result of the product of this number (801 742) by itself (i.e., 801 742 × 801 742); the square of 801 742 is sometimes called "raising 801 742 to the power 2", or "801 742 squared".
The square of 801 742 is 642 790 234 564 because 801 742 × 801 742 = 801 7422 = 642 790 234 564.
As a consequence, 801 742 is the square root of 642 790 234 564.
The multiples of 801 742 are all integers evenly divisible by 801 742, that is all numbers such that the remainder of the division by 801 742 is zero. There are infinitely many multiples of 801 742. The smallest multiples of 801 742 are: