3128065 has 12 divisors (see below), whose sum is σ = 3963924. Its totient is φ = 2369376.

The previous prime is 3128057. The next prime is 3128101. The reversal of 3128065 is 5608213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1256641 + 1871424 = 1121^2 + 1368^2 .

It is not a de Polignac number, because 3128065 - 2³ = 3128057 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 939 + ... + 2671.

It is an arithmetic number, because the mean of its divisors is an integer number (330327).

Almost surely, 2^3128065 is an apocalyptic number.

It is an amenable number.

3128065 is a deficient number, since it is larger than the sum of its proper divisors (835859).

3128065 is a wasteful number, since it uses less digits than its factorization.

3128065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3128065 is about 1768.6336534172. The cubic root of 3128065 is about 146.2486692357.

The spelling of 3128065 in words is "three million, one hundred twenty-eight thousand, sixty-five".