3855871 has 4 divisors (see below), whose sum is σ = 3919144. Its totient is φ = 3792600.

The previous prime is 3855857. The next prime is 3855913. The reversal of 3855871 is 1785583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1785583 = 37 ⋅48259.

It is a cyclic number.

It is not a de Polignac number, because 3855871 - 2⁹ = 3855359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3855871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3855851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31545 + ... + 31666.

It is an arithmetic number, because the mean of its divisors is an integer number (979786).

Almost surely, 2^3855871 is an apocalyptic number.

3855871 is a deficient number, since it is larger than the sum of its proper divisors (63273).

3855871 is an equidigital number, since it uses as much as digits as its factorization.

3855871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63272.

The product of its digits is 33600, while the sum is 37.

The square root of 3855871 is about 1963.6371864476. The cubic root of 3855871 is about 156.8101482178.

The spelling of 3855871 in words is "three million, eight hundred fifty-five thousand, eight hundred seventy-one".