3921956 has 6 divisors (see below), whose sum is σ = 6863430. Its totient is φ = 1960976.

The previous prime is 3921949. The next prime is 3921959. The reversal of 3921956 is 6591293.

3921956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3297856 + 624100 = 1816^2 + 790^2 .

It is not an unprimeable number, because it can be changed into a prime (3921959) 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 as a sum of consecutive naturals, namely, 490241 + ... + 490248.

It is an arithmetic number, because the mean of its divisors is an integer number (1143905).

Almost surely, 2^3921956 is an apocalyptic number.

It is an amenable number.

3921956 is a deficient number, since it is larger than the sum of its proper divisors (2941474).

3921956 is a wasteful number, since it uses less digits than its factorization.

3921956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980493 (or 980491 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 3921956 is about 1980.3928903124. The cubic root of 3921956 is about 157.7009243877.

The spelling of 3921956 in words is "three million, nine hundred twenty-one thousand, nine hundred fifty-six".