3865775 has 12 divisors (see below), whose sum is σ = 4844184. Its totient is φ = 3060000.

The previous prime is 3865769. The next prime is 3865777. The reversal of 3865775 is 5775683.

It is a de Polignac number, because none of the positive numbers 2^k-3865775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1760 + ... + 3290.

It is an arithmetic number, because the mean of its divisors is an integer number (403682).

Almost surely, 2^3865775 is an apocalyptic number.

3865775 is a deficient number, since it is larger than the sum of its proper divisors (978409).

3865775 is a wasteful number, since it uses less digits than its factorization.

3865775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 1637 counting only the distinct ones).

The product of its digits is 176400, while the sum is 41.

The square root of 3865775 is about 1966.1574199438. The cubic root of 3865775 is about 156.9442917017.

The spelling of 3865775 in words is "three million, eight hundred sixty-five thousand, seven hundred seventy-five".