It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 671 522 is not a prime number.
For example, 671 522 can be divided by 2: 671 522 / 2 = 335 761.
For 671 522 to be a prime number, it would have been required that 671 522 has only two divisors, i.e., itself and 1.
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671 522 is an even number, because it is evenly divisible by 2: 671 522 / 2 = 335 761.
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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 671 522 is about 819.464.
Thus, the square root of 671 522 is not an integer, and therefore 671 522 is not a square number.
The square of a number (here 671 522) is the result of the product of this number (671 522) by itself (i.e., 671 522 × 671 522); the square of 671 522 is sometimes called "raising 671 522 to the power 2", or "671 522 squared".
The square of 671 522 is 450 941 796 484 because 671 522 × 671 522 = 671 5222 = 450 941 796 484.
As a consequence, 671 522 is the square root of 450 941 796 484.
The multiples of 671 522 are all integers evenly divisible by 671 522, that is all numbers such that the remainder of the division by 671 522 is zero. There are infinitely many multiples of 671 522. The smallest multiples of 671 522 are: