8805421 has 4 divisors (see below), whose sum is σ = 8822844. Its totient is φ = 8788000.

The previous prime is 8805397. The next prime is 8805437. The reversal of 8805421 is 1245088.

8805421 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 6702921 + 2102500 = 2589^2 + 1450^2 .

It is a 3-Lehmer number, since φ(8805421) divides (8805421-1)³.

It is a cyclic number.

It is not a de Polignac number, because 8805421 - 2¹⁵ = 8772653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8805421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8805451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7930 + ... + 8971.

It is an arithmetic number, because the mean of its divisors is an integer number (2205711).

Almost surely, 2^8805421 is an apocalyptic number.

It is an amenable number.

8805421 is a deficient number, since it is larger than the sum of its proper divisors (17423).

8805421 is a wasteful number, since it uses less digits than its factorization.

8805421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17422.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 8805421 is about 2967.3929635288. The cubic root of 8805421 is about 206.4984082565.

The spelling of 8805421 in words is "eight million, eight hundred five thousand, four hundred twenty-one".