8421043 has 4 divisors (see below), whose sum is σ = 8431920. Its totient is φ = 8410168.

The previous prime is 8421041. The next prime is 8421067. The reversal of 8421043 is 3401248.

8421043 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 is a cyclic number.

It is not a de Polignac number, because 8421043 - 2¹ = 8421041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8421041) 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, 4180 + ... + 5857.

It is an arithmetic number, because the mean of its divisors is an integer number (2107980).

Almost surely, 2^8421043 is an apocalyptic number.

8421043 is a deficient number, since it is larger than the sum of its proper divisors (10877).

8421043 is a wasteful number, since it uses less digits than its factorization.

8421043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10876.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 8421043 is about 2901.9033409127. The cubic root of 8421043 is about 203.4488760733.

The spelling of 8421043 in words is "eight million, four hundred twenty-one thousand, forty-three".