12928231 has 6 divisors (see below), whose sum is σ = 13515320. Its totient is φ = 12365628.

The previous prime is 12928213. The next prime is 12928247. The reversal of 12928231 is 13282921.

12928231 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 12928231 - 2⁷ = 12928103 is a prime.

It is a super-2 number, since 2×12928231² = 334278313578722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12928231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12928261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11691 + ... + 12748.

Almost surely, 2^12928231 is an apocalyptic number.

12928231 is a deficient number, since it is larger than the sum of its proper divisors (587089).

12928231 is an equidigital number, since it uses as much as digits as its factorization.

12928231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24485 (or 24462 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 12928231 is about 3595.5849315515. The cubic root of 12928231 is about 234.6999702092.

The spelling of 12928231 in words is "twelve million, nine hundred twenty-eight thousand, two hundred thirty-one".