12821604 has 24 divisors (see below), whose sum is σ = 31677408. Its totient is φ = 4022400.

The previous prime is 12821581. The next prime is 12821617. The reversal of 12821604 is 40612821.

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, 31222 + ... + 31629.

It is an arithmetic number, because the mean of its divisors is an integer number (1319892).

Almost surely, 2^12821604 is an apocalyptic number.

It is an amenable number.

12821604 is an abundant number, since it is smaller than the sum of its proper divisors (18855804).

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

12821604 is a wasteful number, since it uses less digits than its factorization.

12821604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62875 (or 62873 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12821604 is about 3580.7267418780. The cubic root of 12821604 is about 234.0529502498.

The spelling of 12821604 in words is "twelve million, eight hundred twenty-one thousand, six hundred four".