12928715 has 4 divisors (see below), whose sum is σ = 15514464. Its totient is φ = 10342968.

The previous prime is 12928711. The next prime is 12928717. The reversal of 12928715 is 51782921.

12928715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51782921 = 139 ⋅372539.

It is a cyclic number.

It is not a de Polignac number, because 12928715 - 2² = 12928711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12928711) 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, 1292867 + ... + 1292876.

It is an arithmetic number, because the mean of its divisors is an integer number (3878616).

Almost surely, 2^12928715 is an apocalyptic number.

12928715 is a deficient number, since it is larger than the sum of its proper divisors (2585749).

12928715 is an equidigital number, since it uses as much as digits as its factorization.

12928715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585748.

The product of its digits is 10080, while the sum is 35.

The square root of 12928715 is about 3595.6522356869. The cubic root of 12928715 is about 234.7028990288.

The spelling of 12928715 in words is "twelve million, nine hundred twenty-eight thousand, seven hundred fifteen".