525787 has 4 divisors (see below), whose sum is σ = 553480. Its totient is φ = 498096.

The previous prime is 525781. The next prime is 525809. The reversal of 525787 is 787525.

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

It is a cyclic number.

It is not a de Polignac number, because 525787 - 2¹⁹ = 1499 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525781) 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, 13818 + ... + 13855.

It is an arithmetic number, because the mean of its divisors is an integer number (138370).

2⁵²⁵⁷⁸⁷ is an apocalyptic number.

525787 is a deficient number, since it is larger than the sum of its proper divisors (27693).

525787 is a wasteful number, since it uses less digits than its factorization.

525787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27692.

The product of its digits is 19600, while the sum is 34.

The square root of 525787 is about 725.1117155308. Note that the first 3 decimals coincide. The cubic root of 525787 is about 80.7117222819.

The spelling of 525787 in words is "five hundred twenty-five thousand, seven hundred eighty-seven".