8506621 has 4 divisors (see below), whose sum is σ = 8517600. Its totient is φ = 8495644.

The previous prime is 8506571. The next prime is 8506643. The reversal of 8506621 is 1266058.

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 a cyclic number.

It is not a de Polignac number, because 8506621 - 2¹³ = 8498429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8506621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8506651) 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, 4231 + ... + 5908.

It is an arithmetic number, because the mean of its divisors is an integer number (2129400).

Almost surely, 2^8506621 is an apocalyptic number.

It is an amenable number.

8506621 is a deficient number, since it is larger than the sum of its proper divisors (10979).

8506621 is a wasteful number, since it uses less digits than its factorization.

8506621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10978.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 8506621 is about 2916.6112185206. The cubic root of 8506621 is about 204.1357308304.

The spelling of 8506621 in words is "eight million, five hundred six thousand, six hundred twenty-one".