525823 has 4 divisors (see below), whose sum is σ = 528768. Its totient is φ = 522880.

The previous prime is 525817. The next prime is 525839. The reversal of 525823 is 328525.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525823 is a prime.

It is a d-powerful number, because it can be written as 5 + 2⁴ + 8⁴ + 5⁸ + 2¹⁷ + 3² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525893) 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 in 3 ways as a sum of consecutive naturals, for example, 1186 + ... + 1567.

It is an arithmetic number, because the mean of its divisors is an integer number (132192).

2⁵²⁵⁸²³ is an apocalyptic number.

525823 is a deficient number, since it is larger than the sum of its proper divisors (2945).

525823 is a wasteful number, since it uses less digits than its factorization.

525823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944.

The product of its digits is 2400, while the sum is 25.

The square root of 525823 is about 725.1365388670. The cubic root of 525823 is about 80.7135643179.

The spelling of 525823 in words is "five hundred twenty-five thousand, eight hundred twenty-three".