111320405 has 24 divisors (see below), whose sum is σ = 158344632. Its totient is φ = 74884992.

The previous prime is 111320381. The next prime is 111320423. The reversal of 111320405 is 504023111.

It can be written as a sum of positive squares in 4 ways, for example, as 12794929 + 98525476 = 3577^2 + 9926^2 .

It is not a de Polignac number, because 111320405 - 2⁸ = 111320149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8699 + ... + 17271.

It is an arithmetic number, because the mean of its divisors is an integer number (6597693).

Almost surely, 2^111320405 is an apocalyptic number.

It is an amenable number.

111320405 is a deficient number, since it is larger than the sum of its proper divisors (47024227).

111320405 is an equidigital number, since it uses as much as digits as its factorization.

111320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645 (or 8638 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 111320405 is about 10550.8485440745. The cubic root of 111320405 is about 481.0515214599.

Adding to 111320405 its reverse (504023111), we get a palindrome (615343516).

The spelling of 111320405 in words is "one hundred eleven million, three hundred twenty thousand, four hundred five".