2092021 has 2 divisors, whose sum is σ = 2092022. Its totient is φ = 2092020.

The previous prime is 2092019. The next prime is 2092039. The reversal of 2092021 is 1202902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1512900 + 579121 = 1230^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2092021 - 2¹ = 2092019 is a prime.

Together with 2092019, it forms a pair of twin primes.

2092021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2091986 and 2092004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2092621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1046010 + 1046011.

It is an arithmetic number, because the mean of its divisors is an integer number (1046011).

2^2092021 is an apocalyptic number.

It is an amenable number.

2092021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2092021 is an equidigital number, since it uses as much as digits as its factorization.

2092021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2092021 is about 1446.3820380522. The cubic root of 2092021 is about 127.8955242862.

Adding to 2092021 its reverse (1202902), we get a palindrome (3294923).

The spelling of 2092021 in words is "two million, ninety-two thousand, twenty-one".