8842921 has 4 divisors (see below), whose sum is σ = 9058644. Its totient is φ = 8627200.

The previous prime is 8842919. The next prime is 8842927. The reversal of 8842921 is 1292488.

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 1357225 + 7485696 = 1165^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 8842921 - 2¹ = 8842919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8842927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107800 + ... + 107881.

It is an arithmetic number, because the mean of its divisors is an integer number (2264661).

Almost surely, 2^8842921 is an apocalyptic number.

It is an amenable number.

8842921 is a deficient number, since it is larger than the sum of its proper divisors (215723).

8842921 is a wasteful number, since it uses less digits than its factorization.

8842921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215722.

The product of its digits is 9216, while the sum is 34.

The square root of 8842921 is about 2973.7049281998. The cubic root of 8842921 is about 206.7911341223.

The spelling of 8842921 in words is "eight million, eight hundred forty-two thousand, nine hundred twenty-one".