13871881 has 16 divisors (see below), whose sum is σ = 15716160. Its totient is φ = 12165120.

The previous prime is 13871863. The next prime is 13871927. The reversal of 13871881 is 18817831.

13871881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 5-Lehmer number, since φ(13871881) divides (13871881-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 13871881 - 2²¹ = 11774729 is a prime.

It is a super-2 number, since 2×13871881² = 384858164956322, which contains 22 as substring.

13871881 is a modest number, since divided by 1881 gives 1387 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 13871881.

It is not an unprimeable number, because it can be changed into a prime (13871861) 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, 21321 + ... + 21961.

It is an arithmetic number, because the mean of its divisors is an integer number (982260).

Almost surely, 2^13871881 is an apocalyptic number.

It is an amenable number.

13871881 is a deficient number, since it is larger than the sum of its proper divisors (1844279).

13871881 is a wasteful number, since it uses less digits than its factorization.

13871881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its digits is 10752, while the sum is 37.

The square root of 13871881 is about 3724.4974157596. The cubic root of 13871881 is about 240.2767698246.

The spelling of 13871881 in words is "thirteen million, eight hundred seventy-one thousand, eight hundred eighty-one".