16865525 has 12 divisors (see below), whose sum is σ = 21479652. Its totient is φ = 13127040.

The previous prime is 16865489. The next prime is 16865549. The reversal of 16865525 is 52556861.

It can be written as a sum of positive squares in 6 ways, for example, as 398161 + 16467364 = 631^2 + 4058^2 .

It is not a de Polignac number, because 16865525 - 2¹⁴ = 16849141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8192 + ... + 10041.

It is an arithmetic number, because the mean of its divisors is an integer number (1789971).

Almost surely, 2^16865525 is an apocalyptic number.

It is an amenable number.

16865525 is a deficient number, since it is larger than the sum of its proper divisors (4614127).

16865525 is a wasteful number, since it uses less digits than its factorization.

16865525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18280 (or 18275 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 16865525 is about 4106.7657590859. The cubic root of 16865525 is about 256.4483770225.

The spelling of 16865525 in words is "sixteen million, eight hundred sixty-five thousand, five hundred twenty-five".