3873861 has 12 divisors (see below), whose sum is σ = 5613088. Its totient is φ = 2574504.

The previous prime is 3873847. The next prime is 3873871. The reversal of 3873861 is 1683783.

3873861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3873861 - 2⁵ = 3873829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3873811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4296 + ... + 5118.

Almost surely, 2^3873861 is an apocalyptic number.

It is an amenable number.

3873861 is a deficient number, since it is larger than the sum of its proper divisors (1739227).

3873861 is a wasteful number, since it uses less digits than its factorization.

3873861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352 (or 1349 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 3873861 is about 1968.2126409512. The cubic root of 3873861 is about 157.0536417241.

It can be divided in two parts, 3873 and 861, that multiplied together give a triangular number (3334653 = T₂₅₈₂).

The spelling of 3873861 in words is "three million, eight hundred seventy-three thousand, eight hundred sixty-one".