It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 802 474 is not a prime number.
For example, 802 474 can be divided by 2: 802 474 / 2 = 401 237.
For 802 474 to be a prime number, it would have been required that 802 474 has only two divisors, i.e., itself and 1.
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802 474 is an even number, because it is evenly divisible by 2: 802 474 / 2 = 401 237.
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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 802 474 is about 895.809.
Thus, the square root of 802 474 is not an integer, and therefore 802 474 is not a square number.
The square of a number (here 802 474) is the result of the product of this number (802 474) by itself (i.e., 802 474 × 802 474); the square of 802 474 is sometimes called "raising 802 474 to the power 2", or "802 474 squared".
The square of 802 474 is 643 964 520 676 because 802 474 × 802 474 = 802 4742 = 643 964 520 676.
As a consequence, 802 474 is the square root of 643 964 520 676.
The multiples of 802 474 are all integers evenly divisible by 802 474, that is all numbers such that the remainder of the division by 802 474 is zero. There are infinitely many multiples of 802 474. The smallest multiples of 802 474 are: