505881 has 6 divisors (see below), whose sum is σ = 730730. Its totient is φ = 337248.

The previous prime is 505877. The next prime is 505907. The reversal of 505881 is 188505.

It can be written as a sum of positive squares in only one way, i.e., 467856 + 38025 = 684^2 + 195^2 .

It is not a de Polignac number, because 505881 - 2² = 505877 is a prime.

It is a super-2 number, since 2×505881² = 511831172322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505881.

It is not an unprimeable number, because it can be changed into a prime (505811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28096 + ... + 28113.

2⁵⁰⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

505881 is a deficient number, since it is larger than the sum of its proper divisors (224849).

505881 is a wasteful number, since it uses less digits than its factorization.

505881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56215 (or 56212 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 505881 is about 711.2531195011. The cubic root of 505881 is about 79.6800239815.

The spelling of 505881 in words is "five hundred five thousand, eight hundred eighty-one".