12785439 has 16 divisors (see below), whose sum is σ = 17523200. Its totient is φ = 8289216.

The previous prime is 12785419. The next prime is 12785449. The reversal of 12785439 is 93458721.

It is not a de Polignac number, because 12785439 - 2⁵ = 12785407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12785397 and 12785406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16932 + ... + 17670.

It is an arithmetic number, because the mean of its divisors is an integer number (1095200).

Almost surely, 2^12785439 is an apocalyptic number.

12785439 is a deficient number, since it is larger than the sum of its proper divisors (4737761).

12785439 is an equidigital number, since it uses as much as digits as its factorization.

12785439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894.

The product of its digits is 60480, while the sum is 39.

The square root of 12785439 is about 3575.6732233245. The cubic root of 12785439 is about 233.8326841044.

The spelling of 12785439 in words is "twelve million, seven hundred eighty-five thousand, four hundred thirty-nine".