3865171 has 4 divisors (see below), whose sum is σ = 4092552. Its totient is φ = 3637792.

The previous prime is 3865157. The next prime is 3865187. The reversal of 3865171 is 1715683.

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 3865171 - 2¹⁵ = 3832403 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3866171) 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, 113665 + ... + 113698.

It is an arithmetic number, because the mean of its divisors is an integer number (1023138).

Almost surely, 2^3865171 is an apocalyptic number.

3865171 is a deficient number, since it is larger than the sum of its proper divisors (227381).

3865171 is a wasteful number, since it uses less digits than its factorization.

3865171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227380.

The product of its digits is 5040, while the sum is 31.

The square root of 3865171 is about 1966.0038148488. The cubic root of 3865171 is about 156.9361174641.

The spelling of 3865171 in words is "three million, eight hundred sixty-five thousand, one hundred seventy-one".