12428865 has 24 divisors (see below), whose sum is σ = 21677760. Its totient is φ = 6587424.

The previous prime is 12428837. The next prime is 12428891. The reversal of 12428865 is 56882421.

12428865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12428865 - 2⁸ = 12428609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7284 + ... + 8826.

It is an arithmetic number, because the mean of its divisors is an integer number (903240).

Almost surely, 2^12428865 is an apocalyptic number.

12428865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12428865 is a deficient number, since it is larger than the sum of its proper divisors (9248895).

12428865 is a wasteful number, since it uses less digits than its factorization.

12428865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733 (or 1730 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 12428865 is about 3525.4595445133. The cubic root of 12428865 is about 231.6383646970.

The spelling of 12428865 in words is "twelve million, four hundred twenty-eight thousand, eight hundred sixty-five".