It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 121 402 is not a prime number.
For example, 121 402 can be divided by 2: 121 402 / 2 = 60 701.
For 121 402 to be a prime number, it would have been required that 121 402 has only two divisors, i.e., itself and 1.
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121 402 is an even number, because it is evenly divisible by 2: 121 402 / 2 = 60 701.
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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 121 402 is about 348.428.
Thus, the square root of 121 402 is not an integer, and therefore 121 402 is not a square number.
The square of a number (here 121 402) is the result of the product of this number (121 402) by itself (i.e., 121 402 × 121 402); the square of 121 402 is sometimes called "raising 121 402 to the power 2", or "121 402 squared".
The square of 121 402 is 14 738 445 604 because 121 402 × 121 402 = 121 4022 = 14 738 445 604.
As a consequence, 121 402 is the square root of 14 738 445 604.
The multiples of 121 402 are all integers evenly divisible by 121 402, that is all numbers such that the remainder of the division by 121 402 is zero. There are infinitely many multiples of 121 402. The smallest multiples of 121 402 are: