8064821 has 4 divisors (see below), whose sum is σ = 8175372. Its totient is φ = 7954272.

The previous prime is 8064809. The next prime is 8064827. The reversal of 8064821 is 1284608.

8064821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4774225 + 3290596 = 2185^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 8064821 - 2⁶ = 8064757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8064827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55166 + ... + 55311.

It is an arithmetic number, because the mean of its divisors is an integer number (2043843).

Almost surely, 2^8064821 is an apocalyptic number.

It is an amenable number.

8064821 is a deficient number, since it is larger than the sum of its proper divisors (110551).

8064821 is a wasteful number, since it uses less digits than its factorization.

8064821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110550.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 8064821 is about 2839.8628488010. The cubic root of 8064821 is about 200.5387225870.

The spelling of 8064821 in words is "eight million, sixty-four thousand, eight hundred twenty-one".