It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 122 998 is not a prime number.
For example, 122 998 can be divided by 2: 122 998 / 2 = 61 499.
For 122 998 to be a prime number, it would have been required that 122 998 has only two divisors, i.e., itself and 1.
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122 998 is an even number, because it is evenly divisible by 2: 122 998 / 2 = 61 499.
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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 122 998 is about 350.711.
Thus, the square root of 122 998 is not an integer, and therefore 122 998 is not a square number.
The square of a number (here 122 998) is the result of the product of this number (122 998) by itself (i.e., 122 998 × 122 998); the square of 122 998 is sometimes called "raising 122 998 to the power 2", or "122 998 squared".
The square of 122 998 is 15 128 508 004 because 122 998 × 122 998 = 122 9982 = 15 128 508 004.
As a consequence, 122 998 is the square root of 15 128 508 004.
The multiples of 122 998 are all integers evenly divisible by 122 998, that is all numbers such that the remainder of the division by 122 998 is zero. There are infinitely many multiples of 122 998. The smallest multiples of 122 998 are: