It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 164 is not a prime number.
For example, 402 164 can be divided by 2: 402 164 / 2 = 201 082.
For 402 164 to be a prime number, it would have been required that 402 164 has only two divisors, i.e., itself and 1.
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402 164 is an even number, because it is evenly divisible by 2: 402 164 / 2 = 201 082.
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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 402 164 is about 634.164.
Thus, the square root of 402 164 is not an integer, and therefore 402 164 is not a square number.
The square of a number (here 402 164) is the result of the product of this number (402 164) by itself (i.e., 402 164 × 402 164); the square of 402 164 is sometimes called "raising 402 164 to the power 2", or "402 164 squared".
The square of 402 164 is 161 735 882 896 because 402 164 × 402 164 = 402 1642 = 161 735 882 896.
As a consequence, 402 164 is the square root of 161 735 882 896.
The multiples of 402 164 are all integers evenly divisible by 402 164, that is all numbers such that the remainder of the division by 402 164 is zero. There are infinitely many multiples of 402 164. The smallest multiples of 402 164 are: