16504525 has 6 divisors (see below), whose sum is σ = 20465642. Its totient is φ = 13203600.

The previous prime is 16504519. The next prime is 16504529. The reversal of 16504525 is 52540561.

It can be written as a sum of positive squares in 3 ways, for example, as 1247689 + 15256836 = 1117^2 + 3906^2 .

It is not a de Polignac number, because 16504525 - 2³ = 16504517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16504493 and 16504502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16504529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330066 + ... + 330115.

Almost surely, 2^16504525 is an apocalyptic number.

It is an amenable number.

16504525 is a deficient number, since it is larger than the sum of its proper divisors (3961117).

16504525 is an equidigital number, since it uses as much as digits as its factorization.

16504525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660191 (or 660186 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 16504525 is about 4062.5761531324. The cubic root of 16504525 is about 254.6054387662.

The spelling of 16504525 in words is "sixteen million, five hundred four thousand, five hundred twenty-five".