12928171 has 4 divisors (see below), whose sum is σ = 13374000. Its totient is φ = 12482344.

The previous prime is 12928141. The next prime is 12928183. The reversal of 12928171 is 17182921.

12928171 is digitally balanced in base 3, 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: 17182921 = 7 ⋅2454703.

It is a cyclic number.

It is not a de Polignac number, because 12928171 - 2⁷ = 12928043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12928121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222871 + ... + 222928.

It is an arithmetic number, because the mean of its divisors is an integer number (3343500).

Almost surely, 2^12928171 is an apocalyptic number.

12928171 is a deficient number, since it is larger than the sum of its proper divisors (445829).

12928171 is an equidigital number, since it uses as much as digits as its factorization.

12928171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445828.

The product of its digits is 2016, while the sum is 31.

The square root of 12928171 is about 3595.5765879758. The cubic root of 12928171 is about 234.6996071273.

The spelling of 12928171 in words is "twelve million, nine hundred twenty-eight thousand, one hundred seventy-one".