111541043 has 2 divisors, whose sum is σ = 111541044. Its totient is φ = 111541042.

The previous prime is 111541021. The next prime is 111541139. The reversal of 111541043 is 340145111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111541043 - 2¹⁰ = 111540019 is a prime.

It is not a weakly prime, because it can be changed into another prime (111541013) 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 as a sum of consecutive naturals, namely, 55770521 + 55770522.

It is an arithmetic number, because the mean of its divisors is an integer number (55770522).

Almost surely, 2^111541043 is an apocalyptic number.

111541043 is a deficient number, since it is larger than the sum of its proper divisors (1).

111541043 is an equidigital number, since it uses as much as digits as its factorization.

111541043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 111541043 is about 10561.2993045364. The cubic root of 111541043 is about 481.3691278035.

Adding to 111541043 its reverse (340145111), we get a palindrome (451686154).

The spelling of 111541043 in words is "one hundred eleven million, five hundred forty-one thousand, forty-three".