2071591 has 2 divisors, whose sum is σ = 2071592. Its totient is φ = 2071590.

The previous prime is 2071583. The next prime is 2071613. The reversal of 2071591 is 1951702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2071591 - 2³ = 2071583 is a prime.

It is an Ulam number.

2071591 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2071561) 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, 1035795 + 1035796.

It is an arithmetic number, because the mean of its divisors is an integer number (1035796).

2^2071591 is an apocalyptic number.

2071591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071591 is an equidigital number, since it uses as much as digits as its factorization.

2071591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 2071591 is about 1439.3022615142. The cubic root of 2071591 is about 127.4778328757.

It can be divided in two parts, 2071 and 591, that added together give a palindrome (2662).

The spelling of 2071591 in words is "two million, seventy-one thousand, five hundred ninety-one".