8902021 has 4 divisors (see below), whose sum is σ = 8911072. Its totient is φ = 8892972.

The previous prime is 8902009. The next prime is 8902037. The reversal of 8902021 is 1202098.

8902021 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8902021 - 2¹⁵ = 8869253 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8901983 and 8902001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8902001) 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, 2841 + ... + 5086.

It is an arithmetic number, because the mean of its divisors is an integer number (2227768).

Almost surely, 2^8902021 is an apocalyptic number.

It is an amenable number.

8902021 is a deficient number, since it is larger than the sum of its proper divisors (9051).

8902021 is a wasteful number, since it uses less digits than its factorization.

8902021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 8902021 is about 2983.6254791780. The cubic root of 8902021 is about 207.2507948418.

The spelling of 8902021 in words is "eight million, nine hundred two thousand, twenty-one".