111243142 has 16 divisors (see below), whose sum is σ = 168415632. Its totient is φ = 55107360.

The previous prime is 111243113. The next prime is 111243151. The reversal of 111243142 is 241342111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129988 + ... + 130840.

It is an arithmetic number, because the mean of its divisors is an integer number (10525977).

Almost surely, 2^111243142 is an apocalyptic number.

111243142 is a deficient number, since it is larger than the sum of its proper divisors (57172490).

111243142 is a wasteful number, since it uses less digits than its factorization.

111243142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383.

The product of its digits is 192, while the sum is 19.

The square root of 111243142 is about 10547.1864494755. The cubic root of 111243142 is about 480.9402028871.

Adding to 111243142 its reverse (241342111), we get a palindrome (352585253).

It can be divided in two parts, 111 and 243142, that added together give a triangular number (243253 = T₆₉₇).

The spelling of 111243142 in words is "one hundred eleven million, two hundred forty-three thousand, one hundred forty-two".