16120225 has 27 divisors (see below), whose sum is σ = 22276569. Its totient is φ = 11563200.

The previous prime is 16120213. The next prime is 16120229. The reversal of 16120225 is 52202161.

The square root of 16120225 is 4015.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 88209 + 16032016 = 297^2 + 4004^2 .

It is not a de Polignac number, because 16120225 - 2⁵ = 16120193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16120229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 220789 + ... + 220861.

Almost surely, 2^16120225 is an apocalyptic number.

16120225 is the 4015-th square number.

16120225 is the 2008-th centered octagonal number.

It is an amenable number.

16120225 is a deficient number, since it is larger than the sum of its proper divisors (6156344).

16120225 is an equidigital number, since it uses as much as digits as its factorization.

16120225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The cubic root of 16120225 is about 252.6137774334.

Adding to 16120225 its reverse (52202161), we get a palindrome (68322386).

The spelling of 16120225 in words is "sixteen million, one hundred twenty thousand, two hundred twenty-five".