564891 has 16 divisors (see below), whose sum is σ = 802560. Its totient is φ = 352800.

The previous prime is 564881. The next prime is 564899. The reversal of 564891 is 198465.

It is not a de Polignac number, because 564891 - 2⁶ = 564827 is a prime.

564891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (564899) 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, 3666 + ... + 3816.

It is an arithmetic number, because the mean of its divisors is an integer number (50160).

2⁵⁶⁴⁸⁹¹ is an apocalyptic number.

564891 is a deficient number, since it is larger than the sum of its proper divisors (237669).

564891 is a wasteful number, since it uses less digits than its factorization.

564891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its digits is 8640, while the sum is 33.

The square root of 564891 is about 751.5923096999. The cubic root of 564891 is about 82.6649774918.

The spelling of 564891 in words is "five hundred sixty-four thousand, eight hundred ninety-one".