8642217 has 4 divisors (see below), whose sum is σ = 11522960. Its totient is φ = 5761476.

The previous prime is 8642197. The next prime is 8642237. The reversal of 8642217 is 7122468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (8642197) and next prime (8642237).

It is not a de Polignac number, because 8642217 - 2¹¹ = 8640169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8642237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440367 + ... + 1440372.

It is an arithmetic number, because the mean of its divisors is an integer number (2880740).

Almost surely, 2^8642217 is an apocalyptic number.

It is an amenable number.

8642217 is a deficient number, since it is larger than the sum of its proper divisors (2880743).

8642217 is a wasteful number, since it uses less digits than its factorization.

8642217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880742.

The product of its digits is 5376, while the sum is 30.

The square root of 8642217 is about 2939.7647865093. The cubic root of 8642217 is about 205.2146631034.

It can be divided in two parts, 864 and 2217, that added together give a triangular number (3081 = T₇₈).

The spelling of 8642217 in words is "eight million, six hundred forty-two thousand, two hundred seventeen".