8642287 has 4 divisors (see below), whose sum is σ = 8667400. Its totient is φ = 8617176.

The previous prime is 8642281. The next prime is 8642303. The reversal of 8642287 is 7822468.

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 8642287 - 2⁷ = 8642159 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 (8642281) 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, 12033 + ... + 12730.

It is an arithmetic number, because the mean of its divisors is an integer number (2166850).

Almost surely, 2^8642287 is an apocalyptic number.

8642287 is a deficient number, since it is larger than the sum of its proper divisors (25113).

8642287 is a wasteful number, since it uses less digits than its factorization.

8642287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25112.

The product of its digits is 43008, while the sum is 37.

The square root of 8642287 is about 2939.7766921996. The cubic root of 8642287 is about 205.2152171660.

The spelling of 8642287 in words is "eight million, six hundred forty-two thousand, two hundred eighty-seven".