13855401 has 16 divisors (see below), whose sum is σ = 23459200. Its totient is φ = 7917264.

The previous prime is 13855393. The next prime is 13855403. The reversal of 13855401 is 10455831.

It is not a de Polignac number, because 13855401 - 2³ = 13855393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13855403) 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 15 ways as a sum of consecutive naturals, for example, 36466 + ... + 36843.

It is an arithmetic number, because the mean of its divisors is an integer number (1466200).

Almost surely, 2^13855401 is an apocalyptic number.

It is an amenable number.

13855401 is a deficient number, since it is larger than the sum of its proper divisors (9603799).

13855401 is an equidigital number, since it uses as much as digits as its factorization.

13855401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73325 (or 73319 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 13855401 is about 3722.2843792489. The cubic root of 13855401 is about 240.1815813329.

It can be divided in two parts, 1385 and 5401, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 13855401 in words is "thirteen million, eight hundred fifty-five thousand, four hundred one".