12861904 has 20 divisors (see below), whose sum is σ = 27185760. Its totient is φ = 5846240.

The previous prime is 12861889. The next prime is 12861949. The reversal of 12861904 is 40916821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36364 + ... + 36715.

It is an arithmetic number, because the mean of its divisors is an integer number (1359288).

Almost surely, 2^12861904 is an apocalyptic number.

It is an amenable number.

12861904 is an abundant number, since it is smaller than the sum of its proper divisors (14323856).

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

12861904 is a wasteful number, since it uses less digits than its factorization.

12861904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73098 (or 73092 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12861904 is about 3586.3496762028. The cubic root of 12861904 is about 234.2979135882.

The spelling of 12861904 in words is "twelve million, eight hundred sixty-one thousand, nine hundred four".