42392791 has 6 divisors (see below), whose sum is σ = 49314120. Its totient is φ = 36336636.

The previous prime is 42392789. The next prime is 42392803. The reversal of 42392791 is 19729324.

It is not a de Polignac number, because 42392791 - 2¹ = 42392789 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 42392791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42392891) 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, 432531 + ... + 432628.

It is an arithmetic number, because the mean of its divisors is an integer number (8219020).

Almost surely, 2^42392791 is an apocalyptic number.

42392791 is a deficient number, since it is larger than the sum of its proper divisors (6921329).

42392791 is an equidigital number, since it uses as much as digits as its factorization.

42392791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865173 (or 865166 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 42392791 is about 6510.9746582213. The cubic root of 42392791 is about 348.6829165730.

The spelling of 42392791 in words is "forty-two million, three hundred ninety-two thousand, seven hundred ninety-one".