8605021 has 4 divisors (see below), whose sum is σ = 8722972. Its totient is φ = 8487072.

The previous prime is 8605019. The next prime is 8605057. The reversal of 8605021 is 1205068.

It is a happy number.

8605021 is digitally balanced in base 2, 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 1792921 + 6812100 = 1339^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 8605021 - 2¹ = 8605019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8604983 and 8605001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8605001) 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, 58866 + ... + 59011.

It is an arithmetic number, because the mean of its divisors is an integer number (2180743).

Almost surely, 2^8605021 is an apocalyptic number.

It is an amenable number.

8605021 is a deficient number, since it is larger than the sum of its proper divisors (117951).

8605021 is a wasteful number, since it uses less digits than its factorization.

8605021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117950.

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

The square root of 8605021 is about 2933.4316082022. The cubic root of 8605021 is about 204.9198258764.

The spelling of 8605021 in words is "eight million, six hundred five thousand, twenty-one".