6561204 has 48 divisors (see below), whose sum is σ = 16661568. Its totient is φ = 1997568.

The previous prime is 6561199. The next prime is 6561209. The reversal of 6561204 is 4021656.

It is an interprime number because it is at equal distance from previous prime (6561199) and next prime (6561209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561209) 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 15 ways as a sum of consecutive naturals, for example, 21219 + ... + 21525.

It is an arithmetic number, because the mean of its divisors is an integer number (347116).

Almost surely, 2^6561204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6561204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8330784).

6561204 is an abundant number, since it is smaller than the sum of its proper divisors (10100364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6561204 is a wasteful number, since it uses less digits than its factorization.

6561204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 6561204 is about 2561.4847257011. The cubic root of 6561204 is about 187.2094843248.

The spelling of 6561204 in words is "six million, five hundred sixty-one thousand, two hundred four".