520545 has 8 divisors (see below), whose sum is σ = 832896. Its totient is φ = 277616.

The previous prime is 520529. The next prime is 520547. The reversal of 520545 is 545025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520545 - 2⁴ = 520529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520547) 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 7 ways as a sum of consecutive naturals, for example, 17337 + ... + 17366.

It is an arithmetic number, because the mean of its divisors is an integer number (104112).

2⁵²⁰⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

520545 is a deficient number, since it is larger than the sum of its proper divisors (312351).

520545 is a wasteful number, since it uses less digits than its factorization.

520545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34711.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 520545 is about 721.4880456390. The cubic root of 520545 is about 80.4425988953.

The spelling of 520545 in words is "five hundred twenty thousand, five hundred forty-five".