16782025 has 12 divisors (see below), whose sum is σ = 22410892. Its totient is φ = 12392640.

The previous prime is 16782011. The next prime is 16782037. The reversal of 16782025 is 52028761.

It can be written as a sum of positive squares in 6 ways, for example, as 2913849 + 13868176 = 1707^2 + 3724^2 .

It is not a de Polignac number, because 16782025 - 2¹⁹ = 16257737 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25494 + ... + 26143.

Almost surely, 2^16782025 is an apocalyptic number.

It is an amenable number.

16782025 is a deficient number, since it is larger than the sum of its proper divisors (5628867).

16782025 is a wasteful number, since it uses less digits than its factorization.

16782025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51660 (or 51655 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 16782025 is about 4096.5869940720. The cubic root of 16782025 is about 256.0244575022.

The spelling of 16782025 in words is "sixteen million, seven hundred eighty-two thousand, twenty-five".