13543641 has 12 divisors (see below), whose sum is σ = 19599268. Its totient is φ = 9012384.

The previous prime is 13543633. The next prime is 13543669. The reversal of 13543641 is 14634531.

13543641 is a `hidden beast` number, since 13 + 5 + 4 + 3 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10890000 + 2653641 = 3300^2 + 1629^2 .

It is not a de Polignac number, because 13543641 - 2³ = 13543633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13547641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5571 + ... + 7623.

Almost surely, 2^13543641 is an apocalyptic number.

It is an amenable number.

13543641 is a deficient number, since it is larger than the sum of its proper divisors (6055627).

13543641 is a wasteful number, since it uses less digits than its factorization.

13543641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792 (or 2789 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 13543641 is about 3680.1686102677. The cubic root of 13543641 is about 238.3664587382.

The spelling of 13543641 in words is "thirteen million, five hundred forty-three thousand, six hundred forty-one".