8205247 has 4 divisors (see below), whose sum is σ = 8247096. Its totient is φ = 8163400.

The previous prime is 8205233. The next prime is 8205251. The reversal of 8205247 is 7425028.

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 8205247 - 2¹¹ = 8203199 is a prime.

It is a Duffinian number.

8205247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8205287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20629 + ... + 21022.

It is an arithmetic number, because the mean of its divisors is an integer number (2061774).

Almost surely, 2^8205247 is an apocalyptic number.

8205247 is a deficient number, since it is larger than the sum of its proper divisors (41849).

8205247 is a wasteful number, since it uses less digits than its factorization.

8205247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41848.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 8205247 is about 2864.4802320840. The cubic root of 8205247 is about 201.6959694536.

The spelling of 8205247 in words is "eight million, two hundred five thousand, two hundred forty-seven".