It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 122 478 is not a prime number.
For example, 122 478 can be divided by 2: 122 478 / 2 = 61 239.
For 122 478 to be a prime number, it would have been required that 122 478 has only two divisors, i.e., itself and 1.
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122 478 is an even number, because it is evenly divisible by 2: 122 478 / 2 = 61 239.
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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 122 478 is about 349.969.
Thus, the square root of 122 478 is not an integer, and therefore 122 478 is not a square number.
The square of a number (here 122 478) is the result of the product of this number (122 478) by itself (i.e., 122 478 × 122 478); the square of 122 478 is sometimes called "raising 122 478 to the power 2", or "122 478 squared".
The square of 122 478 is 15 000 860 484 because 122 478 × 122 478 = 122 4782 = 15 000 860 484.
As a consequence, 122 478 is the square root of 15 000 860 484.
The multiples of 122 478 are all integers evenly divisible by 122 478, that is all numbers such that the remainder of the division by 122 478 is zero. There are infinitely many multiples of 122 478. The smallest multiples of 122 478 are: