518725 has 6 divisors (see below), whose sum is σ = 643250. Its totient is φ = 414960.

The previous prime is 518717. The next prime is 518729. The reversal of 518725 is 527815.

It can be written as a sum of positive squares in 3 ways, for example, as 1764 + 516961 = 42^2 + 719^2 .

It is not a de Polignac number, because 518725 - 2³ = 518717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518693 and 518702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518729) 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 5 ways as a sum of consecutive naturals, for example, 10350 + ... + 10399.

2⁵¹⁸⁷²⁵ is an apocalyptic number.

It is an amenable number.

518725 is a deficient number, since it is larger than the sum of its proper divisors (124525).

518725 is a wasteful number, since it uses less digits than its factorization.

518725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20759 (or 20754 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 518725 is about 720.2256590819. The cubic root of 518725 is about 80.3487379804.

The spelling of 518725 in words is "five hundred eighteen thousand, seven hundred twenty-five".