2642391 has 6 divisors (see below), whose sum is σ = 3816800. Its totient is φ = 1761588.

The previous prime is 2642389. The next prime is 2642449. The reversal of 2642391 is 1932462.

2642391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2642391 - 2¹ = 2642389 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 (2642351) 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 5 ways as a sum of consecutive naturals, for example, 146791 + ... + 146808.

2^2642391 is an apocalyptic number.

2642391 is a deficient number, since it is larger than the sum of its proper divisors (1174409).

2642391 is a wasteful number, since it uses less digits than its factorization.

2642391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293605 (or 293602 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 2642391 is about 1625.5432937944. The cubic root of 2642391 is about 138.2501763081.

The spelling of 2642391 in words is "two million, six hundred forty-two thousand, three hundred ninety-one".