512805 has 16 divisors (see below), whose sum is σ = 869184. Its totient is φ = 257280.

The previous prime is 512803. The next prime is 512819. The reversal of 512805 is 508215.

512805 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 512805 - 2¹ = 512803 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512803) 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, 751 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (54324).

2⁵¹²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

512805 is a deficient number, since it is larger than the sum of its proper divisors (356379).

512805 is a wasteful number, since it uses less digits than its factorization.

512805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 512805 is about 716.1040427201. The cubic root of 512805 is about 80.0419051290.

The spelling of 512805 in words is "five hundred twelve thousand, eight hundred five".