111042543 has 16 divisors (see below), whose sum is σ = 151747200. Its totient is φ = 72203040.

The previous prime is 111042497. The next prime is 111042557. The reversal of 111042543 is 345240111.

It is not a de Polignac number, because 111042543 - 2²² = 106848239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111042583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20793 + ... + 25581.

It is an arithmetic number, because the mean of its divisors is an integer number (9484200).

Almost surely, 2^111042543 is an apocalyptic number.

111042543 is a deficient number, since it is larger than the sum of its proper divisors (40704657).

111042543 is a wasteful number, since it uses less digits than its factorization.

111042543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 111042543 is about 10537.6725608647. The cubic root of 111042543 is about 480.6509440908.

Adding to 111042543 its reverse (345240111), we get a palindrome (456282654).

The spelling of 111042543 in words is "one hundred eleven million, forty-two thousand, five hundred forty-three".