525289 has 4 divisors (see below), whose sum is σ = 539524. Its totient is φ = 511056.

The previous prime is 525257. The next prime is 525299. The reversal of 525289 is 982525.

525289 = 45² + 46² + ... + 118².

It is a happy number.

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 501264 + 24025 = 708^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 525289 - 2⁵ = 525257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525289.

It is not an unprimeable number, because it can be changed into a prime (525209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7062 + ... + 7135.

It is an arithmetic number, because the mean of its divisors is an integer number (134881).

2⁵²⁵²⁸⁹ is an apocalyptic number.

It is an amenable number.

525289 is a deficient number, since it is larger than the sum of its proper divisors (14235).

525289 is a wasteful number, since it uses less digits than its factorization.

525289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14234.

The product of its digits is 7200, while the sum is 31.

The square root of 525289 is about 724.7682388185. The cubic root of 525289 is about 80.6862321535.

The spelling of 525289 in words is "five hundred twenty-five thousand, two hundred eighty-nine".