13081641 has 12 divisors (see below), whose sum is σ = 18235728. Its totient is φ = 8340904.

The previous prime is 13081631. The next prime is 13081667. The reversal of 13081641 is 14618031.

13081641 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13081641 - 2¹¹ = 13079593 is a prime.

It is a super-2 number, since 2×13081641² = 342258662505762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13081631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2535 + ... + 5708.

It is an arithmetic number, because the mean of its divisors is an integer number (1519644).

Almost surely, 2^13081641 is an apocalyptic number.

13081641 is the 2288-th centered pentagonal number.

It is an amenable number.

13081641 is a deficient number, since it is larger than the sum of its proper divisors (5154087).

13081641 is an equidigital number, since it uses as much as digits as its factorization.

13081641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8292 (or 8269 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 13081641 is about 3616.8551256582. The cubic root of 13081641 is about 235.6246607185.

Adding to 13081641 its reverse (14618031), we get a palindrome (27699672).

The spelling of 13081641 in words is "thirteen million, eighty-one thousand, six hundred forty-one".