6564945 has 16 divisors (see below), whose sum is σ = 10549440. Its totient is φ = 3486144.

The previous prime is 6564919. The next prime is 6564967. The reversal of 6564945 is 5494656.

It is not a de Polignac number, because 6564945 - 2¹² = 6560849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3222 + ... + 4848.

It is an arithmetic number, because the mean of its divisors is an integer number (659340).

Almost surely, 2^6564945 is an apocalyptic number.

It is an amenable number.

6564945 is a deficient number, since it is larger than the sum of its proper divisors (3984495).

6564945 is a wasteful number, since it uses less digits than its factorization.

6564945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904.

The product of its digits is 129600, while the sum is 39.

The square root of 6564945 is about 2562.2148621847. The cubic root of 6564945 is about 187.2450579592.

The spelling of 6564945 in words is "six million, five hundred sixty-four thousand, nine hundred forty-five".