8522621 has 8 divisors (see below), whose sum is σ = 8998080. Its totient is φ = 8049888.

The previous prime is 8522603. The next prime is 8522623. The reversal of 8522621 is 1262258.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8522621 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 (8522623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11360 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (1124760).

Almost surely, 2^8522621 is an apocalyptic number.

It is an amenable number.

8522621 is a deficient number, since it is larger than the sum of its proper divisors (475459).

8522621 is a wasteful number, since it uses less digits than its factorization.

8522621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363.

The product of its digits is 1920, while the sum is 26.

The square root of 8522621 is about 2919.3528392437. The cubic root of 8522621 is about 204.2636361433.

Adding to 8522621 its reverse (1262258), we get a palindrome (9784879).

The spelling of 8522621 in words is "eight million, five hundred twenty-two thousand, six hundred twenty-one".