2021017 has 2 divisors, whose sum is σ = 2021018. Its totient is φ = 2021016.

The previous prime is 2021009. The next prime is 2021029. The reversal of 2021017 is 7101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879641 + 141376 = 1371^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021017 - 2³ = 2021009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2020988 and 2021006.

It is not a weakly prime, because it can be changed into another prime (2021077) 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, 1010508 + 1010509.

It is an arithmetic number, because the mean of its divisors is an integer number (1010509).

2^2021017 is an apocalyptic number.

It is an amenable number.

2021017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021017 is an equidigital number, since it uses as much as digits as its factorization.

2021017 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2021017 is about 1421.6247746856. The cubic root of 2021017 is about 126.4318973938.

Adding to 2021017 its reverse (7101202), we get a palindrome (9122219).

The spelling of 2021017 in words is "two million, twenty-one thousand, seventeen".