111251142 has 24 divisors (see below), whose sum is σ = 242585616. Its totient is φ = 36846576.

The previous prime is 111251141. The next prime is 111251171. The reversal of 111251142 is 241152111.

111251142 is a `hidden beast` number, since 1 + 112 + 511 + 42 = 666.

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 (111251141) 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, 16858 + ... + 22509.

It is an arithmetic number, because the mean of its divisors is an integer number (10107734).

Almost surely, 2^111251142 is an apocalyptic number.

111251142 is an abundant number, since it is smaller than the sum of its proper divisors (131334474).

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

111251142 is a wasteful number, since it uses less digits than its factorization.

111251142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39532 (or 39529 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 111251142 is about 10547.5656907175. The cubic root of 111251142 is about 480.9517314761.

The spelling of 111251142 in words is "one hundred eleven million, two hundred fifty-one thousand, one hundred forty-two".