It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 122 138 is not a prime number.
For example, 122 138 can be divided by 2: 122 138 / 2 = 61 069.
For 122 138 to be a prime number, it would have been required that 122 138 has only two divisors, i.e., itself and 1.
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122 138 is an even number, because it is evenly divisible by 2: 122 138 / 2 = 61 069.
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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 122 138 is about 349.482.
Thus, the square root of 122 138 is not an integer, and therefore 122 138 is not a square number.
The square of a number (here 122 138) is the result of the product of this number (122 138) by itself (i.e., 122 138 × 122 138); the square of 122 138 is sometimes called "raising 122 138 to the power 2", or "122 138 squared".
The square of 122 138 is 14 917 691 044 because 122 138 × 122 138 = 122 1382 = 14 917 691 044.
As a consequence, 122 138 is the square root of 14 917 691 044.
The multiples of 122 138 are all integers evenly divisible by 122 138, that is all numbers such that the remainder of the division by 122 138 is zero. There are infinitely many multiples of 122 138. The smallest multiples of 122 138 are: