111042142 has 4 divisors (see below), whose sum is σ = 166563216. Its totient is φ = 55521070.

The previous prime is 111042097. The next prime is 111042157. The reversal of 111042142 is 241240111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 27760534 + ... + 27760537.

It is an arithmetic number, because the mean of its divisors is an integer number (41640804).

Almost surely, 2^111042142 is an apocalyptic number.

111042142 is a deficient number, since it is larger than the sum of its proper divisors (55521074).

111042142 is an equidigital number, since it uses as much as digits as its factorization.

111042142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55521073.

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

The square root of 111042142 is about 10537.6535338756. The cubic root of 111042142 is about 480.6503655100.

Adding to 111042142 its reverse (241240111), we get a palindrome (352282253).

The spelling of 111042142 in words is "one hundred eleven million, forty-two thousand, one hundred forty-two".