It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 121 742 is not a prime number.
For example, 121 742 can be divided by 2: 121 742 / 2 = 60 871.
For 121 742 to be a prime number, it would have been required that 121 742 has only two divisors, i.e., itself and 1.
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121 742 is an even number, because it is evenly divisible by 2: 121 742 / 2 = 60 871.
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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 121 742 is about 348.915.
Thus, the square root of 121 742 is not an integer, and therefore 121 742 is not a square number.
The square of a number (here 121 742) is the result of the product of this number (121 742) by itself (i.e., 121 742 × 121 742); the square of 121 742 is sometimes called "raising 121 742 to the power 2", or "121 742 squared".
The square of 121 742 is 14 821 114 564 because 121 742 × 121 742 = 121 7422 = 14 821 114 564.
As a consequence, 121 742 is the square root of 14 821 114 564.
The multiples of 121 742 are all integers evenly divisible by 121 742, that is all numbers such that the remainder of the division by 121 742 is zero. There are infinitely many multiples of 121 742. The smallest multiples of 121 742 are: