3961971 has 12 divisors (see below), whose sum is σ = 6163248. Its totient is φ = 2438064.

The previous prime is 3961967. The next prime is 3961973. The reversal of 3961971 is 1791693.

3961971 is a `hidden beast` number, since 39 + 619 + 7 + 1 = 666.

It is not a de Polignac number, because 3961971 - 2² = 3961967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3961973) 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 11 ways as a sum of consecutive naturals, for example, 16815 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (513604).

Almost surely, 2^3961971 is an apocalyptic number.

3961971 is a deficient number, since it is larger than the sum of its proper divisors (2201277).

3961971 is a wasteful number, since it uses less digits than its factorization.

3961971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33882 (or 33879 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 3961971 is about 1990.4700449894. The cubic root of 3961971 is about 158.2354418599.

The spelling of 3961971 in words is "three million, nine hundred sixty-one thousand, nine hundred seventy-one".