3665871 has 16 divisors (see below), whose sum is σ = 5925120. Its totient is φ = 2221560.

The previous prime is 3665869. The next prime is 3665881. The reversal of 3665871 is 1785663.

It is not a de Polignac number, because 3665871 - 2¹ = 3665869 is a prime.

It is a super-2 number, since 2×3665871² = 26877220377282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665881) 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, 5875 + ... + 6468.

It is an arithmetic number, because the mean of its divisors is an integer number (370320).

Almost surely, 2^3665871 is an apocalyptic number.

3665871 is a deficient number, since it is larger than the sum of its proper divisors (2259249).

3665871 is a wasteful number, since it uses less digits than its factorization.

3665871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12363 (or 12357 counting only the distinct ones).

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

The square root of 3665871 is about 1914.6464425580. The cubic root of 3665871 is about 154.1910122091.

The spelling of 3665871 in words is "three million, six hundred sixty-five thousand, eight hundred seventy-one".