It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 502 is not a prime number.
For example, 402 502 can be divided by 2: 402 502 / 2 = 201 251.
For 402 502 to be a prime number, it would have been required that 402 502 has only two divisors, i.e., itself and 1.
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402 502 is an even number, because it is evenly divisible by 2: 402 502 / 2 = 201 251.
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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 402 502 is about 634.430.
Thus, the square root of 402 502 is not an integer, and therefore 402 502 is not a square number.
The square of a number (here 402 502) is the result of the product of this number (402 502) by itself (i.e., 402 502 × 402 502); the square of 402 502 is sometimes called "raising 402 502 to the power 2", or "402 502 squared".
The square of 402 502 is 162 007 860 004 because 402 502 × 402 502 = 402 5022 = 162 007 860 004.
As a consequence, 402 502 is the square root of 162 007 860 004.
The multiples of 402 502 are all integers evenly divisible by 402 502, that is all numbers such that the remainder of the division by 402 502 is zero. There are infinitely many multiples of 402 502. The smallest multiples of 402 502 are: