3865761 has 6 divisors (see below), whose sum is σ = 5583890. Its totient is φ = 2577168.

The previous prime is 3865747. The next prime is 3865769. The reversal of 3865761 is 1675683.

3865761 is a `hidden beast` number, since 3 + 86 + 576 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3294225 + 571536 = 1815^2 + 756^2 .

It is not a de Polignac number, because 3865761 - 2¹³ = 3857569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3865769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214756 + ... + 214773.

Almost surely, 2^3865761 is an apocalyptic number.

It is an amenable number.

3865761 is a deficient number, since it is larger than the sum of its proper divisors (1718129).

3865761 is a wasteful number, since it uses less digits than its factorization.

3865761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429535 (or 429532 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3865761 is about 1966.1538596966. The cubic root of 3865761 is about 156.9441022422.

The spelling of 3865761 in words is "three million, eight hundred sixty-five thousand, seven hundred sixty-one".