3965645 has 4 divisors (see below), whose sum is σ = 4758780. Its totient is φ = 3172512.

The previous prime is 3965639. The next prime is 3965653. The reversal of 3965645 is 5465693.

3965645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 857476 + 3108169 = 926^2 + 1763^2 .

It is a cyclic number.

It is not a de Polignac number, because 3965645 - 2⁴ = 3965629 is a prime.

It is a super-3 number, since 3×3965645³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3965599 and 3965608.

It is a congruent 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, 396560 + ... + 396569.

It is an arithmetic number, because the mean of its divisors is an integer number (1189695).

Almost surely, 2^3965645 is an apocalyptic number.

It is an amenable number.

3965645 is a deficient number, since it is larger than the sum of its proper divisors (793135).

3965645 is an equidigital number, since it uses as much as digits as its factorization.

3965645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793134.

The product of its digits is 97200, while the sum is 38.

The square root of 3965645 is about 1991.3927287203. The cubic root of 3965645 is about 158.2843381798.

The spelling of 3965645 in words is "three million, nine hundred sixty-five thousand, six hundred forty-five".