8533521 has 6 divisors (see below), whose sum is σ = 12326210. Its totient is φ = 5689008.

The previous prime is 8533517. The next prime is 8533531. The reversal of 8533521 is 1253358.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 239121 = 2880^2 + 489^2 .

It is not a de Polignac number, because 8533521 - 2² = 8533517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8533531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 474076 + ... + 474093.

Almost surely, 2^8533521 is an apocalyptic number.

It is an amenable number.

8533521 is a deficient number, since it is larger than the sum of its proper divisors (3792689).

8533521 is a wasteful number, since it uses less digits than its factorization.

8533521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948175 (or 948172 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 8533521 is about 2921.2190948301. The cubic root of 8533521 is about 204.3506799891.

Adding to 8533521 its reverse (1253358), we get a palindrome (9786879).

The spelling of 8533521 in words is "eight million, five hundred thirty-three thousand, five hundred twenty-one".