111491424 has 96 divisors (see below), whose sum is σ = 354775680. Its totient is φ = 33782400.

The previous prime is 111491377. The next prime is 111491437. The reversal of 111491424 is 424194111.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3639 + ... + 15369.

It is an arithmetic number, because the mean of its divisors is an integer number (3695580).

Almost surely, 2^111491424 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 111491424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177387840).

111491424 is an abundant number, since it is smaller than the sum of its proper divisors (243284256).

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

111491424 is a wasteful number, since it uses less digits than its factorization.

111491424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11761 (or 11747 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 111491424 is about 10558.9499477931. The cubic root of 111491424 is about 481.2977382452.

The spelling of 111491424 in words is "one hundred eleven million, four hundred ninety-one thousand, four hundred twenty-four".