12645636 has 24 divisors (see below), whose sum is σ = 29584800. Its totient is φ = 4204032.

The previous prime is 12645623. The next prime is 12645643. The reversal of 12645636 is 63654621.

It is a junction number, because it is equal to n+sod(n) for n = 12645597 and 12645606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4215 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (1232700).

Almost surely, 2^12645636 is an apocalyptic number.

It is an amenable number.

12645636 is an abundant number, since it is smaller than the sum of its proper divisors (16939164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12645636 is a wasteful number, since it uses less digits than its factorization.

12645636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803 (or 2801 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 12645636 is about 3556.0703030171. The cubic root of 12645636 is about 232.9772737202.

The spelling of 12645636 in words is "twelve million, six hundred forty-five thousand, six hundred thirty-six".