13005161 has 4 divisors (see below), whose sum is σ = 14005572. Its totient is φ = 12004752.

The previous prime is 13005133. The next prime is 13005173. The reversal of 13005161 is 16150031.

13005161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 755161 + 12250000 = 869^2 + 3500^2 .

It is a cyclic number.

It is not a de Polignac number, because 13005161 - 2¹⁰ = 13004137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13005121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500186 + ... + 500211.

It is an arithmetic number, because the mean of its divisors is an integer number (3501393).

Almost surely, 2^13005161 is an apocalyptic number.

It is an amenable number.

13005161 is a deficient number, since it is larger than the sum of its proper divisors (1000411).

13005161 is a wasteful number, since it uses less digits than its factorization.

13005161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000410.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 13005161 is about 3606.2669063728. The cubic root of 13005161 is about 235.1645806510.

Adding to 13005161 its reverse (16150031), we get a palindrome (29155192).

The spelling of 13005161 in words is "thirteen million, five thousand, one hundred sixty-one".