12105171 has 24 divisors (see below), whose sum is σ = 18978960. Its totient is φ = 7390656.

The previous prime is 12105167. The next prime is 12105193. The reversal of 12105171 is 17150121.

It is a happy number.

It is not a de Polignac number, because 12105171 - 2² = 12105167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12105131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18040 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (790790).

Almost surely, 2^12105171 is an apocalyptic number.

12105171 is a deficient number, since it is larger than the sum of its proper divisors (6873789).

12105171 is a wasteful number, since it uses less digits than its factorization.

12105171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 12105171 is about 3479.2486257811. The cubic root of 12105171 is about 229.6097414698.

Adding to 12105171 its reverse (17150121), we get a palindrome (29255292).

The spelling of 12105171 in words is "twelve million, one hundred five thousand, one hundred seventy-one".