13942081 has 8 divisors (see below), whose sum is σ = 14454440. Its totient is φ = 13436928.

The previous prime is 13942073. The next prime is 13942087. The reversal of 13942081 is 18024931.

It is a happy number.

13942081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2005056 + 11937025 = 1416^2 + 3455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(13942081) divides (13942081-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 13942081 - 2³ = 13942073 is a prime.

It is a super-2 number, since 2×13942081² = 388763245221122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13942087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (1806805).

It is a Poulet number, since it divides 2^13942080-1.

Almost surely, 2^13942081 is an apocalyptic number.

It is an amenable number.

13942081 is a deficient number, since it is larger than the sum of its proper divisors (512359).

13942081 is a wasteful number, since it uses less digits than its factorization.

13942081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 13942081 is about 3733.9096132606. The cubic root of 13942081 is about 240.6814026662.

The spelling of 13942081 in words is "thirteen million, nine hundred forty-two thousand, eighty-one".