12928215 has 8 divisors (see below), whose sum is σ = 20685168. Its totient is φ = 6895040.

The previous prime is 12928213. The next prime is 12928247. The reversal of 12928215 is 51282921.

12928215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12928215 - 2¹ = 12928213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12928213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430926 + ... + 430955.

It is an arithmetic number, because the mean of its divisors is an integer number (2585646).

Almost surely, 2^12928215 is an apocalyptic number.

12928215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12928215 is a deficient number, since it is larger than the sum of its proper divisors (7756953).

12928215 is an equidigital number, since it uses as much as digits as its factorization.

12928215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861889.

The product of its digits is 2880, while the sum is 30.

The square root of 12928215 is about 3595.5827065999. The cubic root of 12928215 is about 234.6998733875.

The spelling of 12928215 in words is "twelve million, nine hundred twenty-eight thousand, two hundred fifteen".