111709042 has 4 divisors (see below), whose sum is σ = 167563566. Its totient is φ = 55854520.

The previous prime is 111709009. The next prime is 111709049. The reversal of 111709042 is 240907111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240907111 = 37 ⋅6511003.

It can be written as a sum of positive squares in only one way, i.e., 106275481 + 5433561 = 10309^2 + 2331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111708998 and 111709016.

It is not an unprimeable number, because it can be changed into a prime (111709049) 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 as a sum of consecutive naturals, namely, 27927259 + ... + 27927262.

Almost surely, 2^111709042 is an apocalyptic number.

111709042 is a deficient number, since it is larger than the sum of its proper divisors (55854524).

111709042 is an equidigital number, since it uses as much as digits as its factorization.

111709042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55854523.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 111709042 is about 10569.2498314686. The cubic root of 111709042 is about 481.6106800399.

The spelling of 111709042 in words is "one hundred eleven million, seven hundred nine thousand, forty-two".