13404155 has 4 divisors (see below), whose sum is σ = 16084992. Its totient is φ = 10723320.

The previous prime is 13404137. The next prime is 13404163. The reversal of 13404155 is 55140431.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13404155 - 2⁶ = 13404091 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 13404155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340411 + ... + 1340420.

It is an arithmetic number, because the mean of its divisors is an integer number (4021248).

Almost surely, 2^13404155 is an apocalyptic number.

13404155 is a deficient number, since it is larger than the sum of its proper divisors (2680837).

13404155 is an equidigital number, since it uses as much as digits as its factorization.

13404155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680836.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 13404155 is about 3661.1685293086. The cubic root of 13404155 is about 237.5453209910.

Adding to 13404155 its reverse (55140431), we get a palindrome (68544586).

The spelling of 13404155 in words is "thirteen million, four hundred four thousand, one hundred fifty-five".