12688545 has 24 divisors (see below), whose sum is σ = 21573504. Its totient is φ = 6366976.

The previous prime is 12688531. The next prime is 12688547. The reversal of 12688545 is 54588621.

It is not a de Polignac number, because 12688545 - 2⁵ = 12688513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12688547) 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, 2872 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (898896).

Almost surely, 2^12688545 is an apocalyptic number.

12688545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12688545 is a deficient number, since it is larger than the sum of its proper divisors (8884959).

12688545 is a wasteful number, since it uses less digits than its factorization.

12688545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969 (or 2952 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 12688545 is about 3562.0983984163. The cubic root of 12688545 is about 233.2404880043.

The spelling of 12688545 in words is "twelve million, six hundred eighty-eight thousand, five hundred forty-five".