8140243 has 4 divisors (see below), whose sum is σ = 8166240. Its totient is φ = 8114248.

The previous prime is 8140211. The next prime is 8140247. The reversal of 8140243 is 3420418.

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 8140243 - 2⁵ = 8140211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8140247) 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, 12523 + ... + 13156.

It is an arithmetic number, because the mean of its divisors is an integer number (2041560).

Almost surely, 2^8140243 is an apocalyptic number.

8140243 is a deficient number, since it is larger than the sum of its proper divisors (25997).

8140243 is a wasteful number, since it uses less digits than its factorization.

8140243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25996.

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

The square root of 8140243 is about 2853.1111089476. Note that the first 4 decimals coincide. The cubic root of 8140243 is about 201.1619282084.

The spelling of 8140243 in words is "eight million, one hundred forty thousand, two hundred forty-three".