8358021 has 12 divisors (see below), whose sum is σ = 13797472. Its totient is φ = 4775976.

The previous prime is 8358019. The next prime is 8358029. The reversal of 8358021 is 1208538.

It is a happy number.

8358021 is a `hidden beast` number, since 83 + 580 + 2 + 1 = 666.

8358021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8358021 - 2¹ = 8358019 is a prime.

It is a Duffinian number.

It is a Curzon number.

8358021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8358029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66271 + ... + 66396.

Almost surely, 2^8358021 is an apocalyptic number.

It is an amenable number.

8358021 is a deficient number, since it is larger than the sum of its proper divisors (5439451).

8358021 is a wasteful number, since it uses less digits than its factorization.

8358021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132680 (or 132677 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 8358021 is about 2891.0242129737. The cubic root of 8358021 is about 202.9400763052.

The spelling of 8358021 in words is "eight million, three hundred fifty-eight thousand, twenty-one".