3965965 has 16 divisors (see below), whose sum is σ = 5068800. Its totient is φ = 2970432.

The previous prime is 3965963. The next prime is 3966007. The reversal of 3965965 is 5695693.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3965965 - 2¹ = 3965963 is a prime.

3965965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10164 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (316800).

Almost surely, 2^3965965 is an apocalyptic number.

It is an amenable number.

3965965 is a deficient number, since it is larger than the sum of its proper divisors (1102835).

3965965 is a wasteful number, since it uses less digits than its factorization.

3965965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its digits is 218700, while the sum is 43.

The square root of 3965965 is about 1991.4730728785. The cubic root of 3965965 is about 158.2885955475.

The spelling of 3965965 in words is "three million, nine hundred sixty-five thousand, nine hundred sixty-five".