111342543 has 16 divisors (see below), whose sum is σ = 162266496. Its totient is φ = 67494240.

The previous prime is 111342487. The next prime is 111342547. The reversal of 111342543 is 345243111.

It is a happy number.

It is not a de Polignac number, because 111342543 - 2⁹ = 111342031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111342547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18693 + ... + 23918.

It is an arithmetic number, because the mean of its divisors is an integer number (10141656).

Almost surely, 2^111342543 is an apocalyptic number.

111342543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111342543 is a deficient number, since it is larger than the sum of its proper divisors (50923953).

111342543 is a wasteful number, since it uses less digits than its factorization.

111342543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42694.

The product of its digits is 1440, while the sum is 24.

The square root of 111342543 is about 10551.8976018534. The cubic root of 111342543 is about 481.0834078355.

Adding to 111342543 its reverse (345243111), we get a palindrome (456585654).

The spelling of 111342543 in words is "one hundred eleven million, three hundred forty-two thousand, five hundred forty-three".