523505 has 4 divisors (see below), whose sum is σ = 628212. Its totient is φ = 418800.

The previous prime is 523493. The next prime is 523511. The reversal of 523505 is 505325.

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 309136 + 214369 = 556^2 + 463^2 .

It is not a de Polignac number, because 523505 - 2⁴ = 523489 is a prime.

It is a Duffinian 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, 52346 + ... + 52355.

It is an arithmetic number, because the mean of its divisors is an integer number (157053).

2⁵²³⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

523505 is a deficient number, since it is larger than the sum of its proper divisors (104707).

523505 is a wasteful number, since it uses less digits than its factorization.

523505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104706.

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 523505 is about 723.5364538156. The cubic root of 523505 is about 80.5947856659.

The spelling of 523505 in words is "five hundred twenty-three thousand, five hundred five".