8655521 has 16 divisors (see below), whose sum is σ = 10608384. Its totient is φ = 6899904.

The previous prime is 8655497. The next prime is 8655527. The reversal of 8655521 is 1255568.

8655521 is nontrivially palindromic in base 6.

It is a cyclic number.

It is not a de Polignac number, because 8655521 - 2⁶ = 8655457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (8655527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5231 + ... + 6683.

It is an arithmetic number, because the mean of its divisors is an integer number (663024).

Almost surely, 2^8655521 is an apocalyptic number.

It is an amenable number.

8655521 is a deficient number, since it is larger than the sum of its proper divisors (1952863).

8655521 is a wasteful number, since it uses less digits than its factorization.

8655521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its digits is 12000, while the sum is 32.

The square root of 8655521 is about 2942.0266824079. The cubic root of 8655521 is about 205.3199129527.

The spelling of 8655521 in words is "eight million, six hundred fifty-five thousand, five hundred twenty-one".