525616 has 60 divisors (see below), whose sum is σ = 1322832. Its totient is φ = 196992.

The previous prime is 525607. The next prime is 525641. The reversal of 525616 is 616525.

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

It is an unprimeable 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 in 11 ways as a sum of consecutive naturals, for example, 27655 + ... + 27673.

2⁵²⁵⁶¹⁶ is an apocalyptic number.

525616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661416).

525616 is an abundant number, since it is smaller than the sum of its proper divisors (797216).

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

525616 is a wasteful number, since it uses less digits than its factorization.

525616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 41 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 525616 is about 724.9937930769. The cubic root of 525616 is about 80.7029714626.

Subtracting 525616 from its reverse (616525), we obtain a palindrome (90909).

The spelling of 525616 in words is "five hundred twenty-five thousand, six hundred sixteen".