42422491 has 4 divisors (see below), whose sum is σ = 42472512. Its totient is φ = 42372472.

The previous prime is 42422489. The next prime is 42422503. The reversal of 42422491 is 19422424.

42422491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42422491 - 2¹ = 42422489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42422411) 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 in 3 ways as a sum of consecutive naturals, for example, 23716 + ... + 25441.

It is an arithmetic number, because the mean of its divisors is an integer number (10618128).

Almost surely, 2^42422491 is an apocalyptic number.

42422491 is a deficient number, since it is larger than the sum of its proper divisors (50021).

42422491 is an equidigital number, since it uses as much as digits as its factorization.

42422491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50020.

The product of its digits is 4608, while the sum is 28.

The square root of 42422491 is about 6513.2550234119. The cubic root of 42422491 is about 348.7643255807.

The spelling of 42422491 in words is "forty-two million, four hundred twenty-two thousand, four hundred ninety-one".