525806 has 16 divisors (see below), whose sum is σ = 844560. Its totient is φ = 244800.

The previous prime is 525781. The next prime is 525809. The reversal of 525806 is 608525.

525806 = 16² + 17² + ... + 116².

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3770 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (52785).

2⁵²⁵⁸⁰⁶ is an apocalyptic number.

525806 is a deficient number, since it is larger than the sum of its proper divisors (318754).

525806 is a wasteful number, since it uses less digits than its factorization.

525806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 525806 is about 725.1248168419. The cubic root of 525806 is about 80.7126944780.

It can be divided in two parts, 525 and 806, that added together give a palindrome (1331).

The spelling of 525806 in words is "five hundred twenty-five thousand, eight hundred six".