8642645 has 32 divisors (see below), whose sum is σ = 12082176. Its totient is φ = 5875200.

The previous prime is 8642633. The next prime is 8642651. The reversal of 8642645 is 5462468.

It is not a de Polignac number, because 8642645 - 2⁶ = 8642581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63017 + ... + 63153.

It is an arithmetic number, because the mean of its divisors is an integer number (377568).

Almost surely, 2^8642645 is an apocalyptic number.

It is an amenable number.

8642645 is a deficient number, since it is larger than the sum of its proper divisors (3439531).

8642645 is a wasteful number, since it uses less digits than its factorization.

8642645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 46080, while the sum is 35.

The square root of 8642645 is about 2939.8375805476. The cubic root of 8642645 is about 205.2180507536.

The spelling of 8642645 in words is "eight million, six hundred forty-two thousand, six hundred forty-five".