111442243 has 16 divisors (see below), whose sum is σ = 123282432. Its totient is φ = 99900000.

The previous prime is 111442231. The next prime is 111442271. The reversal of 111442243 is 342244111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111442243 - 2¹³ = 111434051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111442343) 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, 443868 + ... + 444118.

It is an arithmetic number, because the mean of its divisors is an integer number (7705152).

Almost surely, 2^111442243 is an apocalyptic number.

111442243 is a deficient number, since it is larger than the sum of its proper divisors (11840189).

111442243 is a wasteful number, since it uses less digits than its factorization.

111442243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its digits is 768, while the sum is 22.

The square root of 111442243 is about 10556.6208134990. The cubic root of 111442243 is about 481.2269579568.

Adding to 111442243 its reverse (342244111), we get a palindrome (453686354).

The spelling of 111442243 in words is "one hundred eleven million, four hundred forty-two thousand, two hundred forty-three".