13905081 has 32 divisors (see below), whose sum is σ = 21888000. Its totient is φ = 8709120.

The previous prime is 13905077. The next prime is 13905083. The reversal of 13905081 is 18050931.

13905081 = 25³ + 26³ + ... + 86³.

13905081 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 13905081 - 2² = 13905077 is a prime.

It is a super-2 number, since 2×13905081² = 386702555233122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13905083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30745 + ... + 31193.

It is an arithmetic number, because the mean of its divisors is an integer number (684000).

Almost surely, 2^13905081 is an apocalyptic number.

It is an amenable number.

13905081 is a deficient number, since it is larger than the sum of its proper divisors (7982919).

13905081 is a wasteful number, since it uses less digits than its factorization.

13905081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 13905081 is about 3728.9517293738. The cubic root of 13905081 is about 240.4683043682.

The spelling of 13905081 in words is "thirteen million, nine hundred five thousand, eighty-one".