525387 has 4 divisors (see below), whose sum is σ = 700520. Its totient is φ = 350256.

The previous prime is 525379. The next prime is 525391. The reversal of 525387 is 783525.

It is a happy number.

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

It is not a de Polignac number, because 525387 - 2³ = 525379 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525377) 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, 87562 + ... + 87567.

It is an arithmetic number, because the mean of its divisors is an integer number (175130).

2⁵²⁵³⁸⁷ is an apocalyptic number.

525387 is a deficient number, since it is larger than the sum of its proper divisors (175133).

525387 is a wasteful number, since it uses less digits than its factorization.

525387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175132.

The product of its digits is 8400, while the sum is 30.

The square root of 525387 is about 724.8358434846. The cubic root of 525387 is about 80.6912495560.

The spelling of 525387 in words is "five hundred twenty-five thousand, three hundred eighty-seven".