16525 has 6 divisors (see below), whose sum is σ = 20522. Its totient is φ = 13200.

The previous prime is 16519. The next prime is 16529. The reversal of 16525 is 52561.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2601 + 13924 = 51^2 + 118^2 .

It is not a de Polignac number, because 16525 - 2⁵ = 16493 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16529) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 306 + ... + 355.

2¹⁶⁵²⁵ is an apocalyptic number.

It is an amenable number.

16525 is a deficient number, since it is larger than the sum of its proper divisors (3997).

16525 is an equidigital number, since it uses as much as digits as its factorization.

16525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 666 counting only the distinct ones).

The product of its digits is 300, while the sum is 19.

The square root of 16525 is about 128.5496013218. The cubic root of 16525 is about 25.4710680453.

It can be divided in two parts, 165 and 25, that added together give a triangular number (190 = T₁₉).

The spelling of 16525 in words is "sixteen thousand, five hundred twenty-five".