520069 has 4 divisors (see below), whose sum is σ = 567360. Its totient is φ = 472780.

The previous prime is 520067. The next prime is 520073. The reversal of 520069 is 960025.

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 not a de Polignac number, because 520069 - 2¹ = 520067 is a prime.

It is a super-2 number, since 2×520069² = 540943529522, which contains 22 as substring.

It is a Duffinian number.

520069 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520063) by changing a digit.

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, 23629 + ... + 23650.

It is an arithmetic number, because the mean of its divisors is an integer number (141840).

2⁵²⁰⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

520069 is a deficient number, since it is larger than the sum of its proper divisors (47291).

520069 is a wasteful number, since it uses less digits than its factorization.

520069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47290.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 520069 is about 721.1580963977. The cubic root of 520069 is about 80.4180718103.

The spelling of 520069 in words is "five hundred twenty thousand, sixty-nine".