505564 has 12 divisors (see below), whose sum is σ = 894544. Its totient is φ = 249984.

The previous prime is 505559. The next prime is 505573. The reversal of 505564 is 465505.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 264 + ... + 1039.

2⁵⁰⁵⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

505564 is a deficient number, since it is larger than the sum of its proper divisors (388980).

505564 is a wasteful number, since it uses less digits than its factorization.

505564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 505564 is about 711.0302384568. The cubic root of 505564 is about 79.6633772171.

The spelling of 505564 in words is "five hundred five thousand, five hundred sixty-four".