111645872 has 80 divisors (see below), whose sum is σ = 243421920. Its totient is φ = 49268736.

The previous prime is 111645871. The next prime is 111645883. The reversal of 111645872 is 278546111.

It is not an unprimeable number, because it can be changed into a prime (111645871) 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 15 ways as a sum of consecutive naturals, for example, 684863 + ... + 685025.

It is an arithmetic number, because the mean of its divisors is an integer number (3042774).

Almost surely, 2^111645872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111645872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121710960).

111645872 is an abundant number, since it is smaller than the sum of its proper divisors (131776048).

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

111645872 is a wasteful number, since it uses less digits than its factorization.

111645872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 304 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 111645872 is about 10566.2610227081. The cubic root of 111645872 is about 481.5198814122.

The spelling of 111645872 in words is "one hundred eleven million, six hundred forty-five thousand, eight hundred seventy-two".