12881655 has 24 divisors (see below), whose sum is σ = 23100480. Its totient is φ = 6632640.

The previous prime is 12881629. The next prime is 12881657. The reversal of 12881655 is 55618821.

It is a de Polignac number, because none of the positive numbers 2^k-12881655 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12881657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3631 + ... + 6240.

It is an arithmetic number, because the mean of its divisors is an integer number (962520).

Almost surely, 2^12881655 is an apocalyptic number.

12881655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12881655 is a deficient number, since it is larger than the sum of its proper divisors (10218825).

12881655 is a wasteful number, since it uses less digits than its factorization.

12881655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9911 (or 9908 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 12881655 is about 3589.1022554394. The cubic root of 12881655 is about 234.4177831232.

The spelling of 12881655 in words is "twelve million, eight hundred eighty-one thousand, six hundred fifty-five".