505105 has 4 divisors (see below), whose sum is σ = 606132. Its totient is φ = 404080.

The previous prime is 505097. The next prime is 505111. The reversal of 505105 is 501505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65536 + 439569 = 256^2 + 663^2 .

It is not a de Polignac number, because 505105 - 2³ = 505097 is a prime.

It is a super-2 number, since 2×505105² = 510262122050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50506 + ... + 50515.

It is an arithmetic number, because the mean of its divisors is an integer number (151533).

2⁵⁰⁵¹⁰⁵ is an apocalyptic number.

It is an amenable number.

505105 is a deficient number, since it is larger than the sum of its proper divisors (101027).

505105 is a wasteful number, since it uses less digits than its factorization.

505105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101026.

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 505105 is about 710.7073940800. The cubic root of 505105 is about 79.6392612057.

Subtracting from 505105 its reverse (501505), we obtain a square (3600 = 60²).

The spelling of 505105 in words is "five hundred five thousand, one hundred five".