16165925 has 6 divisors (see below), whose sum is σ = 20045778. Its totient is φ = 12932720.

The previous prime is 16165921. The next prime is 16165937. The reversal of 16165925 is 52956161.

It can be written as a sum of positive squares in 3 ways, for example, as 277729 + 15888196 = 527^2 + 3986^2 .

It is not a de Polignac number, because 16165925 - 2² = 16165921 is a prime.

It is a super-2 number, since 2×16165925² = 522674262211250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16165921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323294 + ... + 323343.

It is an arithmetic number, because the mean of its divisors is an integer number (3340963).

Almost surely, 2^16165925 is an apocalyptic number.

It is an amenable number.

16165925 is a deficient number, since it is larger than the sum of its proper divisors (3879853).

16165925 is an equidigital number, since it uses as much as digits as its factorization.

16165925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646647 (or 646642 counting only the distinct ones).

The product of its digits is 16200, while the sum is 35.

The square root of 16165925 is about 4020.6871303298. The cubic root of 16165925 is about 252.8522678488.

The spelling of 16165925 in words is "sixteen million, one hundred sixty-five thousand, nine hundred twenty-five".