111782985 has 16 divisors (see below), whose sum is σ = 188266560. Its totient is φ = 56479680.

The previous prime is 111782981. The next prime is 111782999. The reversal of 111782985 is 589287111.

It is not a de Polignac number, because 111782985 - 2² = 111782981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111782981) 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 15 ways as a sum of consecutive naturals, for example, 195826 + ... + 196395.

It is an arithmetic number, because the mean of its divisors is an integer number (11766660).

Almost surely, 2^111782985 is an apocalyptic number.

111782985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111782985 is a deficient number, since it is larger than the sum of its proper divisors (76483575).

111782985 is a wasteful number, since it uses less digits than its factorization.

111782985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392248.

The product of its digits is 40320, while the sum is 42.

The square root of 111782985 is about 10572.7472777893. The cubic root of 111782985 is about 481.7169199745.

The spelling of 111782985 in words is "one hundred eleven million, seven hundred eighty-two thousand, nine hundred eighty-five".