8540243 has 2 divisors, whose sum is σ = 8540244. Its totient is φ = 8540242.

The previous prime is 8540237. The next prime is 8540281. The reversal of 8540243 is 3420458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8540243 - 2⁴ = 8540227 is a prime.

It is not a weakly prime, because it can be changed into another prime (8540293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4270121 + 4270122.

It is an arithmetic number, because the mean of its divisors is an integer number (4270122).

Almost surely, 2^8540243 is an apocalyptic number.

8540243 is a deficient number, since it is larger than the sum of its proper divisors (1).

8540243 is an equidigital number, since it uses as much as digits as its factorization.

8540243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 8540243 is about 2922.3694153888. The cubic root of 8540243 is about 204.4043227449.

The spelling of 8540243 in words is "eight million, five hundred forty thousand, two hundred forty-three".