505556 has 12 divisors (see below), whose sum is σ = 890400. Its totient is φ = 251160.

The previous prime is 505537. The next prime is 505559. The reversal of 505556 is 655505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505559) by changing a digit.

505556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (74200).

2⁵⁰⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

505556 is a deficient number, since it is larger than the sum of its proper divisors (384844).

505556 is a wasteful number, since it uses less digits than its factorization.

505556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 505556 is about 711.0246127948. The cubic root of 505556 is about 79.6629570195.

The spelling of 505556 in words is "five hundred five thousand, five hundred fifty-six".