520735 has 4 divisors (see below), whose sum is σ = 624888. Its totient is φ = 416584.

The previous prime is 520721. The next prime is 520747. The reversal of 520735 is 537025.

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

It is a cyclic number.

It is not a de Polignac number, because 520735 - 2⁵ = 520703 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52069 + ... + 52078.

It is an arithmetic number, because the mean of its divisors is an integer number (156222).

2⁵²⁰⁷³⁵ is an apocalyptic number.

520735 is a deficient number, since it is larger than the sum of its proper divisors (104153).

520735 is a wasteful number, since it uses less digits than its factorization.

520735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104152.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 520735 is about 721.6197059394. The cubic root of 520735 is about 80.4523849430.

Subtracting 520735 from its reverse (537025), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 520735 in words is "five hundred twenty thousand, seven hundred thirty-five".