2591321 has 4 divisors (see below), whose sum is σ = 2674944. Its totient is φ = 2507700.

The previous prime is 2591273. The next prime is 2591333. The reversal of 2591321 is 1231952.

2591321 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2591321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2591521) 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, 41765 + ... + 41826.

It is an arithmetic number, because the mean of its divisors is an integer number (668736).

2^2591321 is an apocalyptic number.

It is an amenable number.

2591321 is a deficient number, since it is larger than the sum of its proper divisors (83623).

2591321 is an equidigital number, since it uses as much as digits as its factorization.

2591321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83622.

The product of its digits is 540, while the sum is 23.

The square root of 2591321 is about 1609.7580563551. The cubic root of 2591321 is about 137.3537132908.

The spelling of 2591321 in words is "two million, five hundred ninety-one thousand, three hundred twenty-one".