6544025 has 6 divisors (see below), whose sum is σ = 8114622. Its totient is φ = 5235200.

The previous prime is 6544009. The next prime is 6544039. The reversal of 6544025 is 5204456.

6544025 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 5776 + 6538249 = 76^2 + 2557^2 .

It is not a de Polignac number, because 6544025 - 2⁴ = 6544009 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6543985 and 6544003.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 130856 + ... + 130905.

It is an arithmetic number, because the mean of its divisors is an integer number (1352437).

Almost surely, 2^6544025 is an apocalyptic number.

It is an amenable number.

6544025 is a deficient number, since it is larger than the sum of its proper divisors (1570597).

6544025 is a wasteful number, since it uses less digits than its factorization.

6544025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261771 (or 261766 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 6544025 is about 2558.1291992392. The cubic root of 6544025 is about 187.0459532275.

The spelling of 6544025 in words is "six million, five hundred forty-four thousand, twenty-five".