12685329 has 14 divisors (see below), whose sum is σ = 19020386. Its totient is φ = 8456400.

The previous prime is 12685319. The next prime is 12685333. The reversal of 12685329 is 92358621.

It can be written as a sum of positive squares in only one way, i.e., 11209104 + 1476225 = 3348^2 + 1215^2 .

It is not a de Polignac number, because 12685329 - 2⁴ = 12685313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12685293 and 12685302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7972 + ... + 9429.

It is an arithmetic number, because the mean of its divisors is an integer number (1358599).

Almost surely, 2^12685329 is an apocalyptic number.

It is an amenable number.

12685329 is a deficient number, since it is larger than the sum of its proper divisors (6335057).

12685329 is an frugal number, since it uses more digits than its factorization.

12685329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17419 (or 17404 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 12685329 is about 3561.6469504992. The cubic root of 12685329 is about 233.2207808644.

The spelling of 12685329 in words is "twelve million, six hundred eighty-five thousand, three hundred twenty-nine".