2021071 has 6 divisors (see below), whose sum is σ = 2188680. Its totient is φ = 1865448.

The previous prime is 2021053. The next prime is 2021077. The reversal of 2021071 is 1701202.

It is not a de Polignac number, because 2021071 - 2¹¹ = 2019023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5811 + ... + 6148.

It is an arithmetic number, because the mean of its divisors is an integer number (364780).

2^2021071 is an apocalyptic number.

2021071 is a deficient number, since it is larger than the sum of its proper divisors (167609).

2021071 is a wasteful number, since it uses less digits than its factorization.

2021071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11985 (or 11972 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 2021071 is about 1421.6437669121. The cubic root of 2021071 is about 126.4330234377.

Adding to 2021071 its reverse (1701202), we get a palindrome (3722273).

The spelling of 2021071 in words is "two million, twenty-one thousand, seventy-one".