8453021 has 2 divisors, whose sum is σ = 8453022. Its totient is φ = 8453020.

The previous prime is 8452999. The next prime is 8453041. The reversal of 8453021 is 1203548.

8453021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5428900 + 3024121 = 2330^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 8453021 - 2⁶ = 8452957 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8453041) 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, 4226510 + 4226511.

It is an arithmetic number, because the mean of its divisors is an integer number (4226511).

Almost surely, 2^8453021 is an apocalyptic number.

It is an amenable number.

8453021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8453021 is an equidigital number, since it uses as much as digits as its factorization.

8453021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8453021 is about 2907.4079521113. The cubic root of 8453021 is about 203.7060758189.

Adding to 8453021 its reverse (1203548), we get a palindrome (9656569).

The spelling of 8453021 in words is "eight million, four hundred fifty-three thousand, twenty-one".