3872661 has 16 divisors (see below), whose sum is σ = 5617920. Its totient is φ = 2358720.

The previous prime is 3872647. The next prime is 3872669. The reversal of 3872661 is 1662783.

It is not a de Polignac number, because 3872661 - 2¹¹ = 3870613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3872669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3796 + ... + 4706.

It is an arithmetic number, because the mean of its divisors is an integer number (351120).

Almost surely, 2^3872661 is an apocalyptic number.

It is an amenable number.

3872661 is a deficient number, since it is larger than the sum of its proper divisors (1745259).

3872661 is a wasteful number, since it uses less digits than its factorization.

3872661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its digits is 12096, while the sum is 33.

The square root of 3872661 is about 1967.9077722292. The cubic root of 3872661 is about 157.0374232939.

The spelling of 3872661 in words is "three million, eight hundred seventy-two thousand, six hundred sixty-one".