8043921 has 16 divisors (see below), whose sum is σ = 12001920. Its totient is φ = 5324400.

The previous prime is 8043899. The next prime is 8043923. The reversal of 8043921 is 1293408.

It is not a de Polignac number, because 8043921 - 2¹⁰ = 8042897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8043923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3091 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (750120).

Almost surely, 2^8043921 is an apocalyptic number.

It is an amenable number.

8043921 is a deficient number, since it is larger than the sum of its proper divisors (3957999).

8043921 is a wasteful number, since it uses less digits than its factorization.

8043921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8043921 is about 2836.1807065136. The cubic root of 8043921 is about 200.3653405584.

The spelling of 8043921 in words is "eight million, forty-three thousand, nine hundred twenty-one".