520726 has 4 divisors (see below), whose sum is σ = 781092. Its totient is φ = 260362.

The previous prime is 520721. The next prime is 520747. The reversal of 520726 is 627025.

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

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 junction number, because it is equal to n+sod(n) for n = 520697 and 520706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520721) 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 as a sum of consecutive naturals, namely, 130180 + ... + 130183.

It is an arithmetic number, because the mean of its divisors is an integer number (195273).

2⁵²⁰⁷²⁶ is an apocalyptic number.

520726 is a deficient number, since it is larger than the sum of its proper divisors (260366).

520726 is a wasteful number, since it uses less digits than its factorization.

520726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260365.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 520726 is about 721.6134699408. The cubic root of 520726 is about 80.4519214471.

The spelling of 520726 in words is "five hundred twenty thousand, seven hundred twenty-six".