111642147 has 12 divisors (see below), whose sum is σ = 165011704. Its totient is φ = 72696960.

The previous prime is 111642137. The next prime is 111642149. The reversal of 111642147 is 741246111.

111642147 is a `hidden beast` number, since 1 + 1 + 1 + 642 + 14 + 7 = 666.

It is not a de Polignac number, because 111642147 - 2⁷ = 111642019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111642147.

It is not an unprimeable number, because it can be changed into a prime (111642149) 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 11 ways as a sum of consecutive naturals, for example, 143854 + ... + 144627.

Almost surely, 2^111642147 is an apocalyptic number.

111642147 is a deficient number, since it is larger than the sum of its proper divisors (53369557).

111642147 is a wasteful number, since it uses less digits than its factorization.

111642147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288530 (or 288527 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 111642147 is about 10566.0847526413. The cubic root of 111642147 is about 481.5145261418.

Adding to 111642147 its reverse (741246111), we get a palindrome (852888258).

The spelling of 111642147 in words is "one hundred eleven million, six hundred forty-two thousand, one hundred forty-seven".