13401729 has 24 divisors (see below), whose sum is σ = 22362912. Its totient is φ = 7643520.

The previous prime is 13401719. The next prime is 13401737. The reversal of 13401729 is 92710431.

13401729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13401729 - 2⁸ = 13401473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13401719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2299 + ... + 5664.

It is an arithmetic number, because the mean of its divisors is an integer number (931788).

Almost surely, 2^13401729 is an apocalyptic number.

It is an amenable number.

13401729 is a deficient number, since it is larger than the sum of its proper divisors (8961183).

13401729 is a wasteful number, since it uses less digits than its factorization.

13401729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7997 (or 7994 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 13401729 is about 3660.8371993302. The cubic root of 13401729 is about 237.5309891235.

The spelling of 13401729 in words is "thirteen million, four hundred one thousand, seven hundred twenty-nine".