It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 160 121 is not a prime number.
For example, 160 121 can be divided by 13: 160 121 / 13 = 12 317.
For 160 121 to be a prime number, it would have been required that 160 121 has only two divisors, i.e., itself and 1.
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160 121 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 160 121 is about 400.151.
Thus, the square root of 160 121 is not an integer, and therefore 160 121 is not a square number.
The square of a number (here 160 121) is the result of the product of this number (160 121) by itself (i.e., 160 121 × 160 121); the square of 160 121 is sometimes called "raising 160 121 to the power 2", or "160 121 squared".
The square of 160 121 is 25 638 734 641 because 160 121 × 160 121 = 160 1212 = 25 638 734 641.
As a consequence, 160 121 is the square root of 25 638 734 641.
The multiples of 160 121 are all integers evenly divisible by 160 121, that is all numbers such that the remainder of the division by 160 121 is zero. There are infinitely many multiples of 160 121. The smallest multiples of 160 121 are: