2820591 has 6 divisors (see below), whose sum is σ = 4074200. Its totient is φ = 1880388.

The previous prime is 2820563. The next prime is 2820619. The reversal of 2820591 is 1950282.

It is an interprime number because it is at equal distance from previous prime (2820563) and next prime (2820619).

It is not a de Polignac number, because 2820591 - 2⁶ = 2820527 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 (2820541) 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 5 ways as a sum of consecutive naturals, for example, 156691 + ... + 156708.

2^2820591 is an apocalyptic number.

2820591 is a deficient number, since it is larger than the sum of its proper divisors (1253609).

2820591 is a wasteful number, since it uses less digits than its factorization.

2820591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313405 (or 313402 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2820591 is about 1679.4615208453. The cubic root of 2820591 is about 141.2906333617.

The spelling of 2820591 in words is "two million, eight hundred twenty thousand, five hundred ninety-one".