13920401 has 16 divisors (see below), whose sum is σ = 15681600. Its totient is φ = 12249600.

The previous prime is 13920391. The next prime is 13920419. The reversal of 13920401 is 10402931.

It is not a de Polignac number, because 13920401 - 2⁶ = 13920337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13920461) 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, 57641 + ... + 57881.

It is an arithmetic number, because the mean of its divisors is an integer number (980100).

Almost surely, 2^13920401 is an apocalyptic number.

13920401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13920401 is a deficient number, since it is larger than the sum of its proper divisors (1761199).

13920401 is a wasteful number, since it uses less digits than its factorization.

13920401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13920401 is about 3731.0053604893. The cubic root of 13920401 is about 240.5565843839.

The spelling of 13920401 in words is "thirteen million, nine hundred twenty thousand, four hundred one".