13165121 has 2 divisors, whose sum is σ = 13165122. Its totient is φ = 13165120.

The previous prime is 13165099. The next prime is 13165153. The reversal of 13165121 is 12156131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9834496 + 3330625 = 3136^2 + 1825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13165121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13165093 and 13165102.

It is not a weakly prime, because it can be changed into another prime (13165721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6582560 + 6582561.

It is an arithmetic number, because the mean of its divisors is an integer number (6582561).

Almost surely, 2^13165121 is an apocalyptic number.

It is an amenable number.

13165121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13165121 is an equidigital number, since it uses as much as digits as its factorization.

13165121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 13165121 is about 3628.3771854646. The cubic root of 13165121 is about 236.1248083014.

The spelling of 13165121 in words is "thirteen million, one hundred sixty-five thousand, one hundred twenty-one".