115543121 has 2 divisors, whose sum is σ = 115543122. Its totient is φ = 115543120.

The previous prime is 115543097. The next prime is 115543151. The reversal of 115543121 is 121345511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99221521 + 16321600 = 9961^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 115543121 - 2¹⁴ = 115526737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115543151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57771560 + 57771561.

It is an arithmetic number, because the mean of its divisors is an integer number (57771561).

Almost surely, 2^115543121 is an apocalyptic number.

It is an amenable number.

115543121 is a deficient number, since it is larger than the sum of its proper divisors (1).

115543121 is an equidigital number, since it uses as much as digits as its factorization.

115543121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 115543121 is about 10749.0986133722. The cubic root of 115543121 is about 487.0587667503.

Adding to 115543121 its reverse (121345511), we get a palindrome (236888632).

The spelling of 115543121 in words is "one hundred fifteen million, five hundred forty-three thousand, one hundred twenty-one".