16641925 has 6 divisors (see below), whose sum is σ = 20636018. Its totient is φ = 13313520.

The previous prime is 16641923. The next prime is 16641931. The reversal of 16641925 is 52914661.

It can be written as a sum of positive squares in 3 ways, for example, as 133956 + 16507969 = 366^2 + 4063^2 .

It is not a de Polignac number, because 16641925 - 2¹ = 16641923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641923) 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, 332814 + ... + 332863.

Almost surely, 2^16641925 is an apocalyptic number.

It is an amenable number.

16641925 is a deficient number, since it is larger than the sum of its proper divisors (3994093).

16641925 is an equidigital number, since it uses as much as digits as its factorization.

16641925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665687 (or 665682 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 16641925 is about 4079.4515562757. The cubic root of 16641925 is about 255.3100163831.

The spelling of 16641925 in words is "sixteen million, six hundred forty-one thousand, nine hundred twenty-five".