520449 has 4 divisors (see below), whose sum is σ = 693936. Its totient is φ = 346964.

The previous prime is 520447. The next prime is 520451. The reversal of 520449 is 944025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (520447) and next prime (520451).

It is a cyclic number.

It is not a de Polignac number, because 520449 - 2¹ = 520447 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86739 + ... + 86744.

It is an arithmetic number, because the mean of its divisors is an integer number (173484).

2⁵²⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

520449 is a deficient number, since it is larger than the sum of its proper divisors (173487).

520449 is a wasteful number, since it uses less digits than its factorization.

520449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173486.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 520449 is about 721.4215134025. The cubic root of 520449 is about 80.4376534604.

It can be divided in two parts, 5204 and 49, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 520449 in words is "five hundred twenty thousand, four hundred forty-nine".