8217642 has 8 divisors (see below), whose sum is σ = 16435296. Its totient is φ = 2739212.

The previous prime is 8217631. The next prime is 8217653. The reversal of 8217642 is 2467128.

It is an interprime number because it is at equal distance from previous prime (8217631) and next prime (8217653).

It is a sphenic number, since it is the product of 3 distinct primes.

8217642 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684798 + ... + 684809.

It is an arithmetic number, because the mean of its divisors is an integer number (2054412).

Almost surely, 2^8217642 is an apocalyptic number.

8217642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8217642 is a wasteful number, since it uses less digits than its factorization.

8217642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369612.

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

The square root of 8217642 is about 2866.6429843983. The cubic root of 8217642 is about 201.7974802607.

The spelling of 8217642 in words is "eight million, two hundred seventeen thousand, six hundred forty-two".