3921256 has 16 divisors (see below), whose sum is σ = 7524000. Its totient is φ = 1914864.

The previous prime is 3921227. The next prime is 3921287. The reversal of 3921256 is 6521293.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5356 + ... + 6043.

It is an arithmetic number, because the mean of its divisors is an integer number (470250).

Almost surely, 2^3921256 is an apocalyptic number.

It is an amenable number.

3921256 is a deficient number, since it is larger than the sum of its proper divisors (3602744).

3921256 is a wasteful number, since it uses less digits than its factorization.

3921256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11448 (or 11444 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 3921256 is about 1980.2161498180. The cubic root of 3921256 is about 157.6915415512.

The spelling of 3921256 in words is "three million, nine hundred twenty-one thousand, two hundred fifty-six".