8242643 has 4 divisors (see below), whose sum is σ = 8269800. Its totient is φ = 8215488.

The previous prime is 8242639. The next prime is 8242667. The reversal of 8242643 is 3462428.

8242643 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 is a cyclic number.

It is not a de Polignac number, because 8242643 - 2² = 8242639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8242693) 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, 13118 + ... + 13731.

It is an arithmetic number, because the mean of its divisors is an integer number (2067450).

Almost surely, 2^8242643 is an apocalyptic number.

8242643 is a deficient number, since it is larger than the sum of its proper divisors (27157).

8242643 is a wasteful number, since it uses less digits than its factorization.

8242643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27156.

The product of its digits is 9216, while the sum is 29.

The square root of 8242643 is about 2871.0003483107. Note that the first 3 decimals coincide. The cubic root of 8242643 is about 202.0019197282.

The spelling of 8242643 in words is "eight million, two hundred forty-two thousand, six hundred forty-three".