3856851 has 6 divisors (see below), whose sum is σ = 5571020. Its totient is φ = 2571228.

The previous prime is 3856837. The next prime is 3856861. The reversal of 3856851 is 1586583.

It is not a de Polignac number, because 3856851 - 2¹⁵ = 3824083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3856861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214261 + ... + 214278.

Almost surely, 2^3856851 is an apocalyptic number.

3856851 is a deficient number, since it is larger than the sum of its proper divisors (1714169).

3856851 is a wasteful number, since it uses less digits than its factorization.

3856851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428545 (or 428542 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3856851 is about 1963.8867075267. The cubic root of 3856851 is about 156.8234319374.

The spelling of 3856851 in words is "three million, eight hundred fifty-six thousand, eight hundred fifty-one".