111543061 has 6 divisors (see below), whose sum is σ = 129754230. Its totient is φ = 95608296.

The previous prime is 111543043. The next prime is 111543073. The reversal of 111543061 is 160345111.

It can be written as a sum of positive squares in only one way, i.e., 103022500 + 8520561 = 10150^2 + 2919^2 .

It is not a de Polignac number, because 111543061 - 2¹¹ = 111541013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111543011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1138146 + ... + 1138243.

It is an arithmetic number, because the mean of its divisors is an integer number (21625705).

Almost surely, 2^111543061 is an apocalyptic number.

It is an amenable number.

111543061 is a deficient number, since it is larger than the sum of its proper divisors (18211169).

111543061 is an equidigital number, since it uses as much as digits as its factorization.

111543061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276403 (or 2276396 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 111543061 is about 10561.3948415917. The cubic root of 111543061 is about 481.3720307620.

Adding to 111543061 its reverse (160345111), we get a palindrome (271888172).

The spelling of 111543061 in words is "one hundred eleven million, five hundred forty-three thousand, sixty-one".