8427245 has 4 divisors (see below), whose sum is σ = 10112700. Its totient is φ = 6741792.

The previous prime is 8427233. The next prime is 8427247. The reversal of 8427245 is 5427248.

8427245 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4502884 + 3924361 = 2122^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 8427245 - 2⁸ = 8426989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8427247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842720 + ... + 842729.

It is an arithmetic number, because the mean of its divisors is an integer number (2528175).

Almost surely, 2^8427245 is an apocalyptic number.

It is an amenable number.

8427245 is a deficient number, since it is larger than the sum of its proper divisors (1685455).

8427245 is a wasteful number, since it uses less digits than its factorization.

8427245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685454.

The product of its digits is 17920, while the sum is 32.

The square root of 8427245 is about 2902.9717532212. The cubic root of 8427245 is about 203.4988097253.

The spelling of 8427245 in words is "eight million, four hundred twenty-seven thousand, two hundred forty-five".