3965605 has 16 divisors (see below), whose sum is σ = 5627520. Its totient is φ = 2624832.

The previous prime is 3965587. The next prime is 3965617. The reversal of 3965605 is 5065693.

It is not a de Polignac number, because 3965605 - 2¹⁷ = 3834533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939 + ... + 2968.

It is an arithmetic number, because the mean of its divisors is an integer number (351720).

Almost surely, 2^3965605 is an apocalyptic number.

3965605 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3965605 is a deficient number, since it is larger than the sum of its proper divisors (1661915).

3965605 is a wasteful number, since it uses less digits than its factorization.

3965605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 3965605 is about 1991.3826854726. The cubic root of 3965605 is about 158.2838059928.

The spelling of 3965605 in words is "three million, nine hundred sixty-five thousand, six hundred five".