12111671 has 8 divisors (see below), whose sum is σ = 14229264. Its totient is φ = 10163520.

The previous prime is 12111601. The next prime is 12111707. The reversal of 12111671 is 17611121.

12111671 = T₃₃₈ + T₃₃₉ + ... + T₄₈₀.

12111671 = 46² + 47² + ... + 331².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42206 + ... + 42491.

It is an arithmetic number, because the mean of its divisors is an integer number (1778658).

Almost surely, 2^12111671 is an apocalyptic number.

12111671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111671 is a deficient number, since it is larger than the sum of its proper divisors (2117593).

12111671 is a wasteful number, since it uses less digits than its factorization.

12111671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84721.

The product of its digits is 84, while the sum is 20.

The square root of 12111671 is about 3480.1826101514. The cubic root of 12111671 is about 229.6508312450.

Adding to 12111671 its reverse (17611121), we get a palindrome (29722792).

It can be divided in two parts, 1211 and 1671, that added together give a palindrome (2882).

The spelling of 12111671 in words is "twelve million, one hundred eleven thousand, six hundred seventy-one".