111424 has 14 divisors (see below), whose sum is σ = 221234. Its totient is φ = 55680.

The previous prime is 111409. The next prime is 111427. The reversal of 111424 is 424111.

It can be written as a sum of positive squares in only one way, i.e., 57600 + 53824 = 240^2 + 232^2 .

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807 + ... + 934.

2¹¹¹⁴²⁴ is an apocalyptic number.

It is an amenable number.

111424 is a deficient number, since it is larger than the sum of its proper divisors (109810).

111424 is an equidigital number, since it uses as much as digits as its factorization.

111424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753 (or 1743 counting only the distinct ones).

The product of its digits is 32, while the sum is 13.

The square root of 111424 is about 333.8023367204. The cubic root of 111424 is about 48.1200697710.

Adding to 111424 its reverse (424111), we get a palindrome (535535).

It can be divided in two parts, 111 and 424, that added together give a palindrome (535).

The spelling of 111424 in words is "one hundred eleven thousand, four hundred twenty-four", and thus it is an iban number.