2021715 has 12 divisors (see below), whose sum is σ = 3504384. Its totient is φ = 1078224.

The previous prime is 2021711. The next prime is 2021729. The reversal of 2021715 is 5171202.

It is not a de Polignac number, because 2021715 - 2² = 2021711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021711) 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 11 ways as a sum of consecutive naturals, for example, 22419 + ... + 22508.

It is an arithmetic number, because the mean of its divisors is an integer number (292032).

2^2021715 is an apocalyptic number.

2021715 is a deficient number, since it is larger than the sum of its proper divisors (1482669).

2021715 is a wasteful number, since it uses less digits than its factorization.

2021715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44938 (or 44935 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2021715 is about 1421.8702472448. The cubic root of 2021715 is about 126.4464510082.

Adding to 2021715 its reverse (5171202), we get a palindrome (7192917).

The spelling of 2021715 in words is "two million, twenty-one thousand, seven hundred fifteen".