12111604 has 6 divisors (see below), whose sum is σ = 21195314. Its totient is φ = 6055800.

The previous prime is 12111601. The next prime is 12111707. The reversal of 12111604 is 40611121.

It can be written as a sum of positive squares in only one way, i.e., 11209104 + 902500 = 3348^2 + 950^2 .

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 as a sum of consecutive naturals, namely, 1513947 + ... + 1513954.

Almost surely, 2^12111604 is an apocalyptic number.

It is an amenable number.

12111604 is a deficient number, since it is larger than the sum of its proper divisors (9083710).

12111604 is a wasteful number, since it uses less digits than its factorization.

12111604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027905 (or 3027903 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 12111604 is about 3480.1729842064. The cubic root of 12111604 is about 229.6504077793.

Adding to 12111604 its reverse (40611121), we get a palindrome (52722725).

The spelling of 12111604 in words is "twelve million, one hundred eleven thousand, six hundred four".