111185941 has 2 divisors, whose sum is σ = 111185942. Its totient is φ = 111185940.

The previous prime is 111185939. The next prime is 111185983. The reversal of 111185941 is 149581111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86881041 + 24304900 = 9321^2 + 4930^2 .

It is a cyclic number.

It is not a de Polignac number, because 111185941 - 2¹ = 111185939 is a prime.

Together with 111185939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111185911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55592970 + 55592971.

It is an arithmetic number, because the mean of its divisors is an integer number (55592971).

Almost surely, 2^111185941 is an apocalyptic number.

It is an amenable number.

111185941 is a deficient number, since it is larger than the sum of its proper divisors (1).

111185941 is an equidigital number, since it uses as much as digits as its factorization.

111185941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 31.

The square root of 111185941 is about 10544.4744297665. The cubic root of 111185941 is about 480.8577559256.

The spelling of 111185941 in words is "one hundred eleven million, one hundred eighty-five thousand, nine hundred forty-one".