12171043 has 4 divisors (see below), whose sum is σ = 12198600. Its totient is φ = 12143488.

The previous prime is 12171041. The next prime is 12171067. The reversal of 12171043 is 34017121.

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 12171043 - 2¹ = 12171041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12171043.

It is not an unprimeable number, because it can be changed into a prime (12171041) 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, 13105 + ... + 14002.

It is an arithmetic number, because the mean of its divisors is an integer number (3049650).

Almost surely, 2^12171043 is an apocalyptic number.

12171043 is a deficient number, since it is larger than the sum of its proper divisors (27557).

12171043 is an equidigital number, since it uses as much as digits as its factorization.

12171043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27556.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 12171043 is about 3488.7021942264. The cubic root of 12171043 is about 230.0254729191.

Adding to 12171043 its reverse (34017121), we get a palindrome (46188164).

The spelling of 12171043 in words is "twelve million, one hundred seventy-one thousand, forty-three".