525618 has 12 divisors (see below), whose sum is σ = 1138878. Its totient is φ = 175200.

The previous prime is 525607. The next prime is 525641. The reversal of 525618 is 816525.

It can be written as a sum of positive squares in only one way, i.e., 480249 + 45369 = 693^2 + 213^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 525591 and 525600.

It is an unprimeable number.

525618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14583 + ... + 14618.

2⁵²⁵⁶¹⁸ is an apocalyptic number.

525618 is an abundant number, since it is smaller than the sum of its proper divisors (613260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525618 is a wasteful number, since it uses less digits than its factorization.

525618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29209 (or 29206 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 525618 is about 724.9951723977. The cubic root of 525618 is about 80.7030738224.

The spelling of 525618 in words is "five hundred twenty-five thousand, six hundred eighteen".