3866121 has 24 divisors (see below), whose sum is σ = 6452160. Its totient is φ = 2185056.

The previous prime is 3866117. The next prime is 3866141. The reversal of 3866121 is 1216683.

It is not a de Polignac number, because 3866121 - 2² = 3866117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3866141) 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 23 ways as a sum of consecutive naturals, for example, 6586 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (268840).

Almost surely, 2^3866121 is an apocalyptic number.

It is an amenable number.

3866121 is a deficient number, since it is larger than the sum of its proper divisors (2586039).

3866121 is a wasteful number, since it uses less digits than its factorization.

3866121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 682 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 3866121 is about 1966.2454068605. The cubic root of 3866121 is about 156.9489739112.

The spelling of 3866121 in words is "three million, eight hundred sixty-six thousand, one hundred twenty-one".