It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 122 402 is not a prime number.
For example, 122 402 can be divided by 2: 122 402 / 2 = 61 201.
For 122 402 to be a prime number, it would have been required that 122 402 has only two divisors, i.e., itself and 1.
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122 402 is an even number, because it is evenly divisible by 2: 122 402 / 2 = 61 201.
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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 122 402 is about 349.860.
Thus, the square root of 122 402 is not an integer, and therefore 122 402 is not a square number.
The square of a number (here 122 402) is the result of the product of this number (122 402) by itself (i.e., 122 402 × 122 402); the square of 122 402 is sometimes called "raising 122 402 to the power 2", or "122 402 squared".
The square of 122 402 is 14 982 249 604 because 122 402 × 122 402 = 122 4022 = 14 982 249 604.
As a consequence, 122 402 is the square root of 14 982 249 604.
The multiples of 122 402 are all integers evenly divisible by 122 402, that is all numbers such that the remainder of the division by 122 402 is zero. There are infinitely many multiples of 122 402. The smallest multiples of 122 402 are: