It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 162 121 is not a prime number.
For example, 162 121 can be divided by 223: 162 121 / 223 = 727.
For 162 121 to be a prime number, it would have been required that 162 121 has only two divisors, i.e., itself and 1.
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162 121 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 162 121 is about 402.643.
Thus, the square root of 162 121 is not an integer, and therefore 162 121 is not a square number.
The square of a number (here 162 121) is the result of the product of this number (162 121) by itself (i.e., 162 121 × 162 121); the square of 162 121 is sometimes called "raising 162 121 to the power 2", or "162 121 squared".
The square of 162 121 is 26 283 218 641 because 162 121 × 162 121 = 162 1212 = 26 283 218 641.
As a consequence, 162 121 is the square root of 26 283 218 641.
The multiples of 162 121 are all integers evenly divisible by 162 121, that is all numbers such that the remainder of the division by 162 121 is zero. There are infinitely many multiples of 162 121. The smallest multiples of 162 121 are: