6561532 has 24 divisors (see below), whose sum is σ = 12158496. Its totient is φ = 3091968.

The previous prime is 6561521. The next prime is 6561539. The reversal of 6561532 is 2351656.

It is a self number, because there is not a number n which added to its sum of digits gives 6561532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561539) 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 7 ways as a sum of consecutive naturals, for example, 6228 + ... + 7204.

It is an arithmetic number, because the mean of its divisors is an integer number (506604).

Almost surely, 2^6561532 is an apocalyptic number.

It is an amenable number.

6561532 is a deficient number, since it is larger than the sum of its proper divisors (5596964).

6561532 is a wasteful number, since it uses less digits than its factorization.

6561532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1075 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 6561532 is about 2561.5487502681. The cubic root of 6561532 is about 187.2126038583.

The spelling of 6561532 in words is "six million, five hundred sixty-one thousand, five hundred thirty-two".