16128265 has 4 divisors (see below), whose sum is σ = 19353924. Its totient is φ = 12902608.

The previous prime is 16128227. The next prime is 16128317. The reversal of 16128265 is 56282161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5817744 + 10310521 = 2412^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 16128265 - 2¹³ = 16120073 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 1612822 + ... + 1612831.

It is an arithmetic number, because the mean of its divisors is an integer number (4838481).

Almost surely, 2^16128265 is an apocalyptic number.

It is an amenable number.

16128265 is a deficient number, since it is larger than the sum of its proper divisors (3225659).

16128265 is an equidigital number, since it uses as much as digits as its factorization.

16128265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225658.

The product of its digits is 5760, while the sum is 31.

The square root of 16128265 is about 4016.0011205178. The cubic root of 16128265 is about 252.6557676911.

The spelling of 16128265 in words is "sixteen million, one hundred twenty-eight thousand, two hundred sixty-five".