It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 878 is not a prime number.
For example, 120 878 can be divided by 2: 120 878 / 2 = 60 439.
For 120 878 to be a prime number, it would have been required that 120 878 has only two divisors, i.e., itself and 1.
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120 878 is an even number, because it is evenly divisible by 2: 120 878 / 2 = 60 439.
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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 120 878 is about 347.675.
Thus, the square root of 120 878 is not an integer, and therefore 120 878 is not a square number.
The square of a number (here 120 878) is the result of the product of this number (120 878) by itself (i.e., 120 878 × 120 878); the square of 120 878 is sometimes called "raising 120 878 to the power 2", or "120 878 squared".
The square of 120 878 is 14 611 490 884 because 120 878 × 120 878 = 120 8782 = 14 611 490 884.
As a consequence, 120 878 is the square root of 14 611 490 884.
The multiples of 120 878 are all integers evenly divisible by 120 878, that is all numbers such that the remainder of the division by 120 878 is zero. There are infinitely many multiples of 120 878. The smallest multiples of 120 878 are: