8424247 has 4 divisors (see below), whose sum is σ = 9072280. Its totient is φ = 7776216.

The previous prime is 8424211. The next prime is 8424287. The reversal of 8424247 is 7424248.

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 8424247 - 2¹⁵ = 8391479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8424287) 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, 323997 + ... + 324022.

It is an arithmetic number, because the mean of its divisors is an integer number (2268070).

Almost surely, 2^8424247 is an apocalyptic number.

8424247 is a deficient number, since it is larger than the sum of its proper divisors (648033).

8424247 is a wasteful number, since it uses less digits than its factorization.

8424247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648032.

The product of its digits is 14336, while the sum is 31.

The square root of 8424247 is about 2902.4553398804. The cubic root of 8424247 is about 203.4746752348.

Subtracting from 8424247 its reverse (7424248), we obtain a palindrome (999999).

The spelling of 8424247 in words is "eight million, four hundred twenty-four thousand, two hundred forty-seven".