8642865 has 48 divisors (see below), whose sum is σ = 17565120. Its totient is φ = 3588480.

The previous prime is 8642863. The next prime is 8642897. The reversal of 8642865 is 5682468.

It is not a de Polignac number, because 8642865 - 2¹ = 8642863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7551 + ... + 8619.

It is an arithmetic number, because the mean of its divisors is an integer number (365940).

Almost surely, 2^8642865 is an apocalyptic number.

It is an amenable number.

8642865 is an abundant number, since it is smaller than the sum of its proper divisors (8922255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8642865 is a wasteful number, since it uses less digits than its factorization.

8642865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102 (or 1095 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 8642865 is about 2939.8749973426. The cubic root of 8642865 is about 205.2197920256.

The spelling of 8642865 in words is "eight million, six hundred forty-two thousand, eight hundred sixty-five".