13112661 has 16 divisors (see below), whose sum is σ = 18966528. Its totient is φ = 8025600.

The previous prime is 13112651. The next prime is 13112711. The reversal of 13112661 is 16621131.

It is not a de Polignac number, because 13112661 - 2²³ = 4724053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1045 + ... + 5226.

It is an arithmetic number, because the mean of its divisors is an integer number (1185408).

Almost surely, 2^13112661 is an apocalyptic number.

13112661 is the 2091-st octagonal number.

It is an amenable number.

13112661 is a deficient number, since it is larger than the sum of its proper divisors (5853867).

13112661 is a wasteful number, since it uses less digits than its factorization.

13112661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332.

The product of its digits is 216, while the sum is 21.

The square root of 13112661 is about 3621.1408423313. The cubic root of 13112661 is about 235.8107563143.

Adding to 13112661 its reverse (16621131), we get a palindrome (29733792).

The spelling of 13112661 in words is "thirteen million, one hundred twelve thousand, six hundred sixty-one".