3655871 has 4 divisors (see below), whose sum is σ = 3661200. Its totient is φ = 3650544.

The previous prime is 3655849. The next prime is 3655877. The reversal of 3655871 is 1785563.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3655871 - 2⁶ = 3655807 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 (3655877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451 + ... + 3068.

It is an arithmetic number, because the mean of its divisors is an integer number (915300).

Almost surely, 2^3655871 is an apocalyptic number.

3655871 is a deficient number, since it is larger than the sum of its proper divisors (5329).

3655871 is an equidigital number, since it uses as much as digits as its factorization.

3655871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328.

The product of its digits is 25200, while the sum is 35.

The square root of 3655871 is about 1912.0332110086. The cubic root of 3655871 is about 154.0506804579.

The spelling of 3655871 in words is "three million, six hundred fifty-five thousand, eight hundred seventy-one".