112885781 has 4 divisors (see below), whose sum is σ = 114003564. Its totient is φ = 111768000.

The previous prime is 112885769. The next prime is 112885823. The reversal of 112885781 is 187588211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187588211 = 29 ⋅6468559.

It can be written as a sum of positive squares in 2 ways, for example, as 89605156 + 23280625 = 9466^2 + 4825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112885781 is a prime.

It is a super-2 number, since 2×112885781² = 25486399103959922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112885181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558740 + ... + 558941.

It is an arithmetic number, because the mean of its divisors is an integer number (28500891).

Almost surely, 2^112885781 is an apocalyptic number.

It is an amenable number.

112885781 is a deficient number, since it is larger than the sum of its proper divisors (1117783).

112885781 is a wasteful number, since it uses less digits than its factorization.

112885781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117782.

The product of its digits is 35840, while the sum is 41.

The square root of 112885781 is about 10624.7720446135. The cubic root of 112885781 is about 483.2958664047.

The spelling of 112885781 in words is "one hundred twelve million, eight hundred eighty-five thousand, seven hundred eighty-one".