8867021 has 4 divisors (see below), whose sum is σ = 9012444. Its totient is φ = 8721600.

The previous prime is 8867003. The next prime is 8867063. The reversal of 8867021 is 1207688.

8867021 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 4515625 + 4351396 = 2125^2 + 2086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8867021 is a prime.

It is a super-2 number, since 2×8867021² = 157248122828882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8867071) 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, 72620 + ... + 72741.

It is an arithmetic number, because the mean of its divisors is an integer number (2253111).

Almost surely, 2^8867021 is an apocalyptic number.

It is an amenable number.

8867021 is a deficient number, since it is larger than the sum of its proper divisors (145423).

8867021 is a wasteful number, since it uses less digits than its factorization.

8867021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145422.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 8867021 is about 2977.7543552147. The cubic root of 8867021 is about 206.9788226991.

The spelling of 8867021 in words is "eight million, eight hundred sixty-seven thousand, twenty-one".