111520404 has 18 divisors (see below), whose sum is σ = 281898890. Its totient is φ = 37173456.

The previous prime is 111520403. The next prime is 111520411. The reversal of 111520404 is 404025111.

It can be written as a sum of positive squares in only one way, i.e., 111260304 + 260100 = 10548^2 + 510^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111520403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1548859 + ... + 1548930.

Almost surely, 2^111520404 is an apocalyptic number.

It is an amenable number.

111520404 is an abundant number, since it is smaller than the sum of its proper divisors (170378486).

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

111520404 is a wasteful number, since it uses less digits than its factorization.

111520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097799 (or 3097794 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 111520404 is about 10560.3221541769. The cubic root of 111520404 is about 481.3394359221.

Adding to 111520404 its reverse (404025111), we get a palindrome (515545515).

The spelling of 111520404 in words is "one hundred eleven million, five hundred twenty thousand, four hundred four".