6552521 has 4 divisors (see below), whose sum is σ = 6778500. Its totient is φ = 6326544.

The previous prime is 6552503. The next prime is 6552527. The reversal of 6552521 is 1252556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 1081600 = 2339^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 6552521 - 2⁶ = 6552457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6552527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112946 + ... + 113003.

It is an arithmetic number, because the mean of its divisors is an integer number (1694625).

Almost surely, 2^6552521 is an apocalyptic number.

It is an amenable number.

6552521 is a deficient number, since it is larger than the sum of its proper divisors (225979).

6552521 is a wasteful number, since it uses less digits than its factorization.

6552521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225978.

The product of its digits is 3000, while the sum is 26.

The square root of 6552521 is about 2559.7892491375. The cubic root of 6552521 is about 187.1268644504.

The spelling of 6552521 in words is "six million, five hundred fifty-two thousand, five hundred twenty-one".