12805616 has 10 divisors (see below), whose sum is σ = 24810912. Its totient is φ = 6402800.

The previous prime is 12805613. The next prime is 12805621. The reversal of 12805616 is 61650821.

It is a happy number.

12805616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12805616² = 327967602278912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400160 + ... + 400191.

Almost surely, 2^12805616 is an apocalyptic number.

12805616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12805616 is a deficient number, since it is larger than the sum of its proper divisors (12005296).

12805616 is an equidigital number, since it uses as much as digits as its factorization.

12805616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800359 (or 800353 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12805616 is about 3578.4935377893. The cubic root of 12805616 is about 233.9556250624.

The spelling of 12805616 in words is "twelve million, eight hundred five thousand, six hundred sixteen".