111231985 has 8 divisors (see below), whose sum is σ = 140503680. Its totient is φ = 84302064.

The previous prime is 111231983. The next prime is 111231997. The reversal of 111231985 is 589132111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111231985 - 2¹ = 111231983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111231983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585337 + ... + 585526.

It is an arithmetic number, because the mean of its divisors is an integer number (17562960).

Almost surely, 2^111231985 is an apocalyptic number.

It is an amenable number.

111231985 is a deficient number, since it is larger than the sum of its proper divisors (29271695).

111231985 is a wasteful number, since it uses less digits than its factorization.

111231985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170887.

The product of its digits is 2160, while the sum is 31.

The square root of 111231985 is about 10546.6575273875. The cubic root of 111231985 is about 480.9241239057.

The spelling of 111231985 in words is "one hundred eleven million, two hundred thirty-one thousand, nine hundred eighty-five".