111420142 has 32 divisors (see below), whose sum is σ = 194400000. Its totient is φ = 47507328.

The previous prime is 111420139. The next prime is 111420149. The reversal of 111420142 is 241024111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111420149) 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, 11109 + ... + 18607.

It is an arithmetic number, because the mean of its divisors is an integer number (6075000).

Almost surely, 2^111420142 is an apocalyptic number.

111420142 is a deficient number, since it is larger than the sum of its proper divisors (82979858).

111420142 is a wasteful number, since it uses less digits than its factorization.

111420142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7560.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 111420142 is about 10555.5739777617. The cubic root of 111420142 is about 481.1951438682.

Adding to 111420142 its reverse (241024111), we get a palindrome (352444253).

The spelling of 111420142 in words is "one hundred eleven million, four hundred twenty thousand, one hundred forty-two".