12788545 has 32 divisors (see below), whose sum is σ = 19491840. Its totient is φ = 7823040.

The previous prime is 12788543. The next prime is 12788563. The reversal of 12788545 is 54588721.

12788545 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12788545 - 2¹ = 12788543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12788498 and 12788507.

It is not an unprimeable number, because it can be changed into a prime (12788543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22434 + ... + 22996.

It is an arithmetic number, because the mean of its divisors is an integer number (609120).

Almost surely, 2^12788545 is an apocalyptic number.

12788545 is the 2065-th octagonal number.

It is an amenable number.

12788545 is a deficient number, since it is larger than the sum of its proper divisors (6703295).

12788545 is a wasteful number, since it uses less digits than its factorization.

12788545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its digits is 89600, while the sum is 40.

The square root of 12788545 is about 3576.1075207549. The cubic root of 12788545 is about 233.8516177657.

The spelling of 12788545 in words is "twelve million, seven hundred eighty-eight thousand, five hundred forty-five".