12881605 has 8 divisors (see below), whose sum is σ = 16863264. Its totient is φ = 9368400.

The previous prime is 12881599. The next prime is 12881629. The reversal of 12881605 is 50618821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12881605 - 2¹⁵ = 12848837 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 7 ways as a sum of consecutive naturals, for example, 117051 + ... + 117160.

It is an arithmetic number, because the mean of its divisors is an integer number (2107908).

Almost surely, 2^12881605 is an apocalyptic number.

It is an amenable number.

12881605 is a deficient number, since it is larger than the sum of its proper divisors (3981659).

12881605 is a wasteful number, since it uses less digits than its factorization.

12881605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234227.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 12881605 is about 3589.0952899025. The cubic root of 12881605 is about 234.4174798261.

The spelling of 12881605 in words is "twelve million, eight hundred eighty-one thousand, six hundred five".