13401665 has 8 divisors (see below), whose sum is σ = 16159488. Its totient is φ = 10669680.

The previous prime is 13401637. The next prime is 13401667. The reversal of 13401665 is 56610431.

13401665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-13401665 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401667) 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, 5297 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (2019936).

Almost surely, 2^13401665 is an apocalyptic number.

It is an amenable number.

13401665 is a deficient number, since it is larger than the sum of its proper divisors (2757823).

13401665 is a wasteful number, since it uses less digits than its factorization.

13401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12919.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 13401665 is about 3660.8284581499. The cubic root of 13401665 is about 237.5306110129.

The spelling of 13401665 in words is "thirteen million, four hundred one thousand, six hundred sixty-five".