2021593 has 6 divisors (see below), whose sum is σ = 2351706. Its totient is φ = 1732752.

The previous prime is 2021573. The next prime is 2021597. The reversal of 2021593 is 3951202.

It can be written as a sum of positive squares in only one way, i.e., 1570009 + 451584 = 1253^2 + 672^2 .

It is not a de Polignac number, because 2021593 - 2⁹ = 2021081 is a prime.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (2021597) 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, 20580 + ... + 20677.

It is an arithmetic number, because the mean of its divisors is an integer number (391951).

2^2021593 is an apocalyptic number.

It is an amenable number.

2021593 is a deficient number, since it is larger than the sum of its proper divisors (330113).

2021593 is an equidigital number, since it uses as much as digits as its factorization.

2021593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41271 (or 41264 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 2021593 is about 1421.8273453553. The cubic root of 2021593 is about 126.4439074949.

Adding to 2021593 its reverse (3951202), we get a palindrome (5972795).

The spelling of 2021593 in words is "two million, twenty-one thousand, five hundred ninety-three".