12111864 has 16 divisors (see below), whose sum is σ = 30279720. Its totient is φ = 4037280.

The previous prime is 12111859. The next prime is 12111877. The reversal of 12111864 is 46811121.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 504661 = 12111864 / (1 + 2 + 1 + 1 + 1 + 8 + 6 + 4).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252307 + ... + 252354.

Almost surely, 2^12111864 is an apocalyptic number.

It is an amenable number.

12111864 is an abundant number, since it is smaller than the sum of its proper divisors (18167856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111864 is a wasteful number, since it uses less digits than its factorization.

12111864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504670 (or 504666 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

The square root of 12111864 is about 3480.2103384709. The cubic root of 12111864 is about 229.6520510705.

Adding to 12111864 its reverse (46811121), we get a palindrome (58922985).

The spelling of 12111864 in words is "twelve million, one hundred eleven thousand, eight hundred sixty-four".