12398171 has 4 divisors (see below), whose sum is σ = 12798144. Its totient is φ = 11998200.

The previous prime is 12398159. The next prime is 12398179. The reversal of 12398171 is 17189321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12398171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12398179) 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, 199940 + ... + 200001.

It is an arithmetic number, because the mean of its divisors is an integer number (3199536).

Almost surely, 2^12398171 is an apocalyptic number.

12398171 is a deficient number, since it is larger than the sum of its proper divisors (399973).

12398171 is an equidigital number, since it uses as much as digits as its factorization.

12398171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399972.

The product of its digits is 3024, while the sum is 32.

The square root of 12398171 is about 3521.1036622059. The cubic root of 12398171 is about 231.4475248302.

The spelling of 12398171 in words is "twelve million, three hundred ninety-eight thousand, one hundred seventy-one".