2642591 has 4 divisors (see below), whose sum is σ = 3020112. Its totient is φ = 2265072.

The previous prime is 2642587. The next prime is 2642603. The reversal of 2642591 is 1952462.

It is a happy number.

2642591 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, and also an emirpimes, since its reverse is a distinct semiprime: 1952462 = 2 ⋅976231.

It is a cyclic number.

It is not a de Polignac number, because 2642591 - 2² = 2642587 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 (2642561) 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 3 ways as a sum of consecutive naturals, for example, 188750 + ... + 188763.

It is an arithmetic number, because the mean of its divisors is an integer number (755028).

2^2642591 is an apocalyptic number.

2642591 is a deficient number, since it is larger than the sum of its proper divisors (377521).

2642591 is an equidigital number, since it uses as much as digits as its factorization.

2642591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377520.

The product of its digits is 4320, while the sum is 29.

The square root of 2642591 is about 1625.6048105244. The cubic root of 2642591 is about 138.2536642271.

The spelling of 2642591 in words is "two million, six hundred forty-two thousand, five hundred ninety-one".