2590391 has 4 divisors (see below), whose sum is σ = 2673984. Its totient is φ = 2506800.

The previous prime is 2590387. The next prime is 2590397. The reversal of 2590391 is 1930952.

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 2590391 - 2² = 2590387 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 (2590397) 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, 41750 + ... + 41811.

It is an arithmetic number, because the mean of its divisors is an integer number (668496).

2^2590391 is an apocalyptic number.

2590391 is a deficient number, since it is larger than the sum of its proper divisors (83593).

2590391 is an equidigital number, since it uses as much as digits as its factorization.

2590391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83592.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 2590391 is about 1609.4691671480. The cubic root of 2590391 is about 137.3372796857.

The spelling of 2590391 in words is "two million, five hundred ninety thousand, three hundred ninety-one".