It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 162 402 is not a prime number.
For example, 162 402 can be divided by 2: 162 402 / 2 = 81 201.
For 162 402 to be a prime number, it would have been required that 162 402 has only two divisors, i.e., itself and 1.
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162 402 is an even number, because it is evenly divisible by 2: 162 402 / 2 = 81 201.
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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 162 402 is about 402.991.
Thus, the square root of 162 402 is not an integer, and therefore 162 402 is not a square number.
The square of a number (here 162 402) is the result of the product of this number (162 402) by itself (i.e., 162 402 × 162 402); the square of 162 402 is sometimes called "raising 162 402 to the power 2", or "162 402 squared".
The square of 162 402 is 26 374 409 604 because 162 402 × 162 402 = 162 4022 = 26 374 409 604.
As a consequence, 162 402 is the square root of 26 374 409 604.
The multiples of 162 402 are all integers evenly divisible by 162 402, that is all numbers such that the remainder of the division by 162 402 is zero. There are infinitely many multiples of 162 402. The smallest multiples of 162 402 are: