523506 has 8 divisors (see below), whose sum is σ = 1047024. Its totient is φ = 174500.

The previous prime is 523493. The next prime is 523511. The reversal of 523506 is 605325.

523506 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

523506 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43620 + ... + 43631.

It is an arithmetic number, because the mean of its divisors is an integer number (130878).

2⁵²³⁵⁰⁶ is an apocalyptic number.

523506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523506 is a wasteful number, since it uses less digits than its factorization.

523506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87256.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 523506 is about 723.5371448654. The cubic root of 523506 is about 80.5948369833.

The spelling of 523506 in words is "five hundred twenty-three thousand, five hundred six".