2821591 has 2 divisors, whose sum is σ = 2821592. Its totient is φ = 2821590.

The previous prime is 2821573. The next prime is 2821601. The reversal of 2821591 is 1951282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2821591 - 2⁷ = 2821463 is a prime.

It is a super-2 number, since 2×2821591² = 15922751542562, which contains 22 as substring.

It is a Chen prime.

2821591 is a lucky number.

It is equal to p₂₀₄₈₅₉ and since 2821591 and 204859 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2821501) 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 as a sum of consecutive naturals, namely, 1410795 + 1410796.

It is an arithmetic number, because the mean of its divisors is an integer number (1410796).

2^2821591 is an apocalyptic number.

2821591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821591 is an equidigital number, since it uses as much as digits as its factorization.

2821591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 28.

The square root of 2821591 is about 1679.7592089344. The cubic root of 2821591 is about 141.3073289099.

The spelling of 2821591 in words is "two million, eight hundred twenty-one thousand, five hundred ninety-one".