12660855 has 32 divisors (see below), whose sum is σ = 20945088. Its totient is φ = 6528000.

The previous prime is 12660847. The next prime is 12660881. The reversal of 12660855 is 55806621.

It is not a de Polignac number, because 12660855 - 2³ = 12660847 is a prime.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 92347 + ... + 92483.

It is an arithmetic number, because the mean of its divisors is an integer number (654534).

Almost surely, 2^12660855 is an apocalyptic number.

12660855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12660855 is a deficient number, since it is larger than the sum of its proper divisors (8284233).

12660855 is a wasteful number, since it uses less digits than its factorization.

12660855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 12660855 is about 3558.2095216555. The cubic root of 12660855 is about 233.0706988268.

The spelling of 12660855 in words is "twelve million, six hundred sixty thousand, eight hundred fifty-five".