12919171 has 4 divisors (see below), whose sum is σ = 13138200. Its totient is φ = 12700144.

The previous prime is 12919163. The next prime is 12919189. The reversal of 12919171 is 17191921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12919171 - 2³ = 12919163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12919111) 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, 109426 + ... + 109543.

It is an arithmetic number, because the mean of its divisors is an integer number (3284550).

Almost surely, 2^12919171 is an apocalyptic number.

12919171 is a deficient number, since it is larger than the sum of its proper divisors (219029).

12919171 is an equidigital number, since it uses as much as digits as its factorization.

12919171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219028.

The product of its digits is 1134, while the sum is 31.

The square root of 12919171 is about 3594.3248322877. The cubic root of 12919171 is about 234.6451321152.

The spelling of 12919171 in words is "twelve million, nine hundred nineteen thousand, one hundred seventy-one".