3981256 has 16 divisors (see below), whose sum is σ = 7536240. Its totient is φ = 1971600.

The previous prime is 3981253. The next prime is 3981301. The reversal of 3981256 is 6521893.

It is not an unprimeable number, because it can be changed into a prime (3981253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470 + ... + 3181.

It is an arithmetic number, because the mean of its divisors is an integer number (471015).

Almost surely, 2^3981256 is an apocalyptic number.

It is an amenable number.

3981256 is a deficient number, since it is larger than the sum of its proper divisors (3554984).

3981256 is a wasteful number, since it uses less digits than its factorization.

3981256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764 (or 4760 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 3981256 is about 1995.3084974510. The cubic root of 3981256 is about 158.4917648400.

The spelling of 3981256 in words is "three million, nine hundred eighty-one thousand, two hundred fifty-six".