It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 671 502 is not a prime number.
For example, 671 502 can be divided by 2: 671 502 / 2 = 335 751.
For 671 502 to be a prime number, it would have been required that 671 502 has only two divisors, i.e., itself and 1.
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671 502 is an even number, because it is evenly divisible by 2: 671 502 / 2 = 335 751.
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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 671 502 is about 819.452.
Thus, the square root of 671 502 is not an integer, and therefore 671 502 is not a square number.
The square of a number (here 671 502) is the result of the product of this number (671 502) by itself (i.e., 671 502 × 671 502); the square of 671 502 is sometimes called "raising 671 502 to the power 2", or "671 502 squared".
The square of 671 502 is 450 914 936 004 because 671 502 × 671 502 = 671 5022 = 450 914 936 004.
As a consequence, 671 502 is the square root of 450 914 936 004.
The multiples of 671 502 are all integers evenly divisible by 671 502, that is all numbers such that the remainder of the division by 671 502 is zero. There are infinitely many multiples of 671 502. The smallest multiples of 671 502 are: