2021497 has 2 divisors, whose sum is σ = 2021498. Its totient is φ = 2021496.

The previous prime is 2021489. The next prime is 2021501. The reversal of 2021497 is 7941202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597696 + 423801 = 1264^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021497 - 2³ = 2021489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021197) 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, 1010748 + 1010749.

It is an arithmetic number, because the mean of its divisors is an integer number (1010749).

2^2021497 is an apocalyptic number.

It is an amenable number.

2021497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021497 is an equidigital number, since it uses as much as digits as its factorization.

2021497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2021497 is about 1421.7935855813. The cubic root of 2021497 is about 126.4419059698.

Adding to 2021497 its reverse (7941202), we get a palindrome (9962699).

The spelling of 2021497 in words is "two million, twenty-one thousand, four hundred ninety-seven".