111284138 has 8 divisors (see below), whose sum is σ = 190772832. Its totient is φ = 47693196.

The previous prime is 111284137. The next prime is 111284171. The reversal of 111284138 is 831482111.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111284138.

It is not an unprimeable number, because it can be changed into a prime (111284137) 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 3 ways as a sum of consecutive naturals, for example, 3974420 + ... + 3974447.

It is an arithmetic number, because the mean of its divisors is an integer number (23846604).

Almost surely, 2^111284138 is an apocalyptic number.

111284138 is a deficient number, since it is larger than the sum of its proper divisors (79488694).

111284138 is an equidigital number, since it uses as much as digits as its factorization.

111284138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948876.

The product of its digits is 1536, while the sum is 29.

The square root of 111284138 is about 10549.1297271386. The cubic root of 111284138 is about 480.9992753017. Note that the first 3 decimals are identical.

The spelling of 111284138 in words is "one hundred eleven million, two hundred eighty-four thousand, one hundred thirty-eight".