12805216 has 24 divisors (see below), whose sum is σ = 26694360. Its totient is φ = 6025728.

The previous prime is 12805193. The next prime is 12805217. The reversal of 12805216 is 61250821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11226 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (1112265).

Almost surely, 2^12805216 is an apocalyptic number.

12805216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12805216 is an abundant number, since it is smaller than the sum of its proper divisors (13889144).

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

12805216 is a wasteful number, since it uses less digits than its factorization.

12805216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23566 (or 23558 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12805216 is about 3578.4376479128. The cubic root of 12805216 is about 233.9531890681.

The spelling of 12805216 in words is "twelve million, eight hundred five thousand, two hundred sixteen".