12788739 has 16 divisors (see below), whose sum is σ = 19600800. Its totient is φ = 8231328.

The previous prime is 12788719. The next prime is 12788801. The reversal of 12788739 is 93788721.

It is not a de Polignac number, because 12788739 - 2⁵ = 12788707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12788694 and 12788703.

It is not an unprimeable number, because it can be changed into a prime (12788719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7384 + ... + 8949.

It is an arithmetic number, because the mean of its divisors is an integer number (1225050).

Almost surely, 2^12788739 is an apocalyptic number.

12788739 is a deficient number, since it is larger than the sum of its proper divisors (6812061).

12788739 is a wasteful number, since it uses less digits than its factorization.

12788739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16371 (or 16365 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 12788739 is about 3576.1346451161. The cubic root of 12788739 is about 233.8528002558.

The spelling of 12788739 in words is "twelve million, seven hundred eighty-eight thousand, seven hundred thirty-nine".