111604 has 6 divisors (see below), whose sum is σ = 195314. Its totient is φ = 55800.

The previous prime is 111599. The next prime is 111611. The reversal of 111604 is 406111.

It can be written as a sum of positive squares in only one way, i.e., 108900 + 2704 = 330^2 + 52^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13947 + ... + 13954.

2¹¹¹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

111604 is a deficient number, since it is larger than the sum of its proper divisors (83710).

111604 is a wasteful number, since it uses less digits than its factorization.

111604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27905 (or 27903 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 111604 is about 334.0718485596. The cubic root of 111604 is about 48.1459677002.

Adding to 111604 its product of nonzero digits (24), we get a triangular number (111628 = T₄₇₂).

Adding to 111604 its reverse (406111), we get a palindrome (517715).

The spelling of 111604 in words is "one hundred eleven thousand, six hundred four".