2054021 has 2 divisors, whose sum is σ = 2054022. Its totient is φ = 2054020.

The previous prime is 2054011. The next prime is 2054023. The reversal of 2054021 is 1204502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1677025 + 376996 = 1295^2 + 614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2054021 is a prime.

Together with 2054023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2053987 and 2054005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2054023) 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, 1027010 + 1027011.

It is an arithmetic number, because the mean of its divisors is an integer number (1027011).

2^2054021 is an apocalyptic number.

It is an amenable number.

2054021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2054021 is an equidigital number, since it uses as much as digits as its factorization.

2054021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2054021 is about 1433.1856125429. The cubic root of 2054021 is about 127.1164121601.

Adding to 2054021 its reverse (1204502), we get a palindrome (3258523).

The spelling of 2054021 in words is "two million, fifty-four thousand, twenty-one".