13856401 has 8 divisors (see below), whose sum is σ = 15286824. Its totient is φ = 12478080.

The previous prime is 13856369. The next prime is 13856413. The reversal of 13856401 is 10465831.

It can be written as a sum of positive squares in 4 ways, for example, as 1324801 + 12531600 = 1151^2 + 3540^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13856401 - 2⁵ = 13856369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13856401.

It is not an unprimeable number, because it can be changed into a prime (13856441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12466 + ... + 13531.

It is an arithmetic number, because the mean of its divisors is an integer number (1910853).

Almost surely, 2^13856401 is an apocalyptic number.

It is an amenable number.

13856401 is a deficient number, since it is larger than the sum of its proper divisors (1430423).

13856401 is a wasteful number, since it uses less digits than its factorization.

13856401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26051.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 13856401 is about 3722.4187029403. The cubic root of 13856401 is about 240.1873594841.

The spelling of 13856401 in words is "thirteen million, eight hundred fifty-six thousand, four hundred one".