42044113 has 6 divisors (see below), whose sum is σ = 43544774. Its totient is φ = 40593504.

The previous prime is 42044089. The next prime is 42044117. The reversal of 42044113 is 31144024.

It can be written as a sum of positive squares in 3 ways, for example, as 9690769 + 32353344 = 3113^2 + 5688^2 .

It is not a de Polignac number, because 42044113 - 2⁵ = 42044081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42044117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24156 + ... + 25837.

Almost surely, 2^42044113 is an apocalyptic number.

It is an amenable number.

42044113 is a deficient number, since it is larger than the sum of its proper divisors (1500661).

42044113 is an equidigital number, since it uses as much as digits as its factorization.

42044113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50051 (or 50022 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42044113 is about 6484.1431970616. The cubic root of 42044113 is about 347.7243187034.

Adding to 42044113 its reverse (31144024), we get a palindrome (73188137).

The spelling of 42044113 in words is "forty-two million, forty-four thousand, one hundred thirteen".