520249 has 4 divisors (see below), whose sum is σ = 532980. Its totient is φ = 507520.

The previous prime is 520241. The next prime is 520279. The reversal of 520249 is 942025.

It is a happy number.

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 40000 + 480249 = 200^2 + 693^2 .

It is a cyclic number.

It is not a de Polignac number, because 520249 - 2³ = 520241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520241) 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 3 ways as a sum of consecutive naturals, for example, 6304 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (133245).

2⁵²⁰²⁴⁹ is an apocalyptic number.

It is an amenable number.

520249 is a deficient number, since it is larger than the sum of its proper divisors (12731).

520249 is a wasteful number, since it uses less digits than its factorization.

520249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12730.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 520249 is about 721.2828848656. The cubic root of 520249 is about 80.4273485174.

The spelling of 520249 in words is "five hundred twenty thousand, two hundred forty-nine".