525386 has 4 divisors (see below), whose sum is σ = 788082. Its totient is φ = 262692.

The previous prime is 525379. The next prime is 525391. The reversal of 525386 is 683525.

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

It can be written as a sum of positive squares in only one way, i.e., 511225 + 14161 = 715^2 + 119^2 .

It is a Curzon number.

It is an unprimeable number.

525386 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131345 + ... + 131348.

2⁵²⁵³⁸⁶ is an apocalyptic number.

525386 is a deficient number, since it is larger than the sum of its proper divisors (262696).

525386 is a wasteful number, since it uses less digits than its factorization.

525386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262695.

The product of its digits is 7200, while the sum is 29.

The square root of 525386 is about 724.8351536729. The cubic root of 525386 is about 80.6911983612.

The spelling of 525386 in words is "five hundred twenty-five thousand, three hundred eighty-six".