111206142 has 32 divisors (see below), whose sum is σ = 247680000. Its totient is φ = 36985464.

The previous prime is 111206119. The next prime is 111206143. The reversal of 111206142 is 241602111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111206143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24883 + ... + 29009.

It is an arithmetic number, because the mean of its divisors is an integer number (7740000).

Almost surely, 2^111206142 is an apocalyptic number.

111206142 is an abundant number, since it is smaller than the sum of its proper divisors (136473858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111206142 is a wasteful number, since it uses less digits than its factorization.

111206142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637 (or 4631 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 111206142 is about 10545.4322813245. The cubic root of 111206142 is about 480.8868759721.

Adding to 111206142 its reverse (241602111), we get a palindrome (352808253).

The spelling of 111206142 in words is "one hundred eleven million, two hundred six thousand, one hundred forty-two".