42404111 has 12 divisors (see below), whose sum is σ = 44992080. Its totient is φ = 39953760.

The previous prime is 42404093. The next prime is 42404113. The reversal of 42404111 is 11140424.

It is a de Polignac number, because none of the positive numbers 2^k-42404111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42404111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42404113) 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 11 ways as a sum of consecutive naturals, for example, 36995 + ... + 38123.

It is an arithmetic number, because the mean of its divisors is an integer number (3749340).

Almost surely, 2^42404111 is an apocalyptic number.

42404111 is a deficient number, since it is larger than the sum of its proper divisors (2587969).

42404111 is a wasteful number, since it uses less digits than its factorization.

42404111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 42404111 is about 6511.8439016917. The cubic root of 42404111 is about 348.7139496743.

Adding to 42404111 its reverse (11140424), we get a palindrome (53544535).

The spelling of 42404111 in words is "forty-two million, four hundred four thousand, one hundred eleven".