13605155 has 4 divisors (see below), whose sum is σ = 16326192. Its totient is φ = 10884120.

The previous prime is 13605139. The next prime is 13605161. The reversal of 13605155 is 55150631.

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

It is not a de Polignac number, because 13605155 - 2⁴ = 13605139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1360511 + ... + 1360520.

It is an arithmetic number, because the mean of its divisors is an integer number (4081548).

Almost surely, 2^13605155 is an apocalyptic number.

13605155 is a deficient number, since it is larger than the sum of its proper divisors (2721037).

13605155 is an equidigital number, since it uses as much as digits as its factorization.

13605155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721036.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 13605155 is about 3688.5166395178. The cubic root of 13605155 is about 238.7267934280.

Adding to 13605155 its reverse (55150631), we get a palindrome (68755786).

The spelling of 13605155 in words is "thirteen million, six hundred five thousand, one hundred fifty-five".