13540891 has 16 divisors (see below), whose sum is σ = 17648064. Its totient is φ = 10082304.

The previous prime is 13540889. The next prime is 13540897. The reversal of 13540891 is 19804531.

It is a cyclic number.

It is not a de Polignac number, because 13540891 - 2¹ = 13540889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13540897) 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, 2830 + ... + 5923.

It is an arithmetic number, because the mean of its divisors is an integer number (1103004).

Almost surely, 2^13540891 is an apocalyptic number.

13540891 is a deficient number, since it is larger than the sum of its proper divisors (4107173).

13540891 is a wasteful number, since it uses less digits than its factorization.

13540891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 13540891 is about 3679.7949671143. The cubic root of 13540891 is about 238.3503244226.

The spelling of 13540891 in words is "thirteen million, five hundred forty thousand, eight hundred ninety-one".