12605155 has 4 divisors (see below), whose sum is σ = 15126192. Its totient is φ = 10084120.

The previous prime is 12605137. The next prime is 12605167. The reversal of 12605155 is 55150621.

12605155 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55150621 = 109 ⋅505969.

It is not a de Polignac number, because 12605155 - 2¹⁷ = 12474083 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260511 + ... + 1260520.

It is an arithmetic number, because the mean of its divisors is an integer number (3781548).

Almost surely, 2^12605155 is an apocalyptic number.

12605155 is a deficient number, since it is larger than the sum of its proper divisors (2521037).

12605155 is an equidigital number, since it uses as much as digits as its factorization.

12605155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521036.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 12605155 is about 3550.3739239691. The cubic root of 12605155 is about 232.7284069815.

Adding to 12605155 its reverse (55150621), we get a palindrome (67755776).

The spelling of 12605155 in words is "twelve million, six hundred five thousand, one hundred fifty-five".