It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 121 489 is not a prime number.
For example, 121 489 can be divided by 31: 121 489 / 31 = 3 919.
For 121 489 to be a prime number, it would have been required that 121 489 has only two divisors, i.e., itself and 1.
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121 489 is an odd number, because it is not evenly divisible by 2.
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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 121 489 is about 348.553.
Thus, the square root of 121 489 is not an integer, and therefore 121 489 is not a square number.
The square of a number (here 121 489) is the result of the product of this number (121 489) by itself (i.e., 121 489 × 121 489); the square of 121 489 is sometimes called "raising 121 489 to the power 2", or "121 489 squared".
The square of 121 489 is 14 759 577 121 because 121 489 × 121 489 = 121 4892 = 14 759 577 121.
As a consequence, 121 489 is the square root of 14 759 577 121.
The multiples of 121 489 are all integers evenly divisible by 121 489, that is all numbers such that the remainder of the division by 121 489 is zero. There are infinitely many multiples of 121 489. The smallest multiples of 121 489 are: