12555605 has 12 divisors (see below), whose sum is σ = 16006980. Its totient is φ = 9452544.

The previous prime is 12555593. The next prime is 12555607. The reversal of 12555605 is 50655521.

It can be written as a sum of positive squares in 6 ways, for example, as 2430481 + 10125124 = 1559^2 + 3182^2 .

It is not a de Polignac number, because 12555605 - 2⁸ = 12555349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2900 + ... + 5789.

It is an arithmetic number, because the mean of its divisors is an integer number (1333915).

Almost surely, 2^12555605 is an apocalyptic number.

It is an amenable number.

12555605 is a deficient number, since it is larger than the sum of its proper divisors (3451375).

12555605 is an equidigital number, since it uses as much as digits as its factorization.

12555605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8728 (or 8711 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 12555605 is about 3543.3889145845. The cubic root of 12555605 is about 232.4230600620.

The spelling of 12555605 in words is "twelve million, five hundred fifty-five thousand, six hundred five".