8065021 has 4 divisors (see below), whose sum is σ = 8539452. Its totient is φ = 7590592.

The previous prime is 8065009. The next prime is 8065033. The reversal of 8065021 is 1205608.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8065009) and next prime (8065033).

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 2839225 = 2286^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 8065021 - 2⁷ = 8064893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8064983 and 8065001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8065051) 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 in 3 ways as a sum of consecutive naturals, for example, 237190 + ... + 237223.

It is an arithmetic number, because the mean of its divisors is an integer number (2134863).

Almost surely, 2^8065021 is an apocalyptic number.

It is an amenable number.

8065021 is a deficient number, since it is larger than the sum of its proper divisors (474431).

8065021 is a wasteful number, since it uses less digits than its factorization.

8065021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474430.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 8065021 is about 2839.8980615508. The cubic root of 8065021 is about 200.5403802974.

The spelling of 8065021 in words is "eight million, sixty-five thousand, twenty-one".