3995971 has 4 divisors (see below), whose sum is σ = 4566832. Its totient is φ = 3425112.

The previous prime is 3995941. The next prime is 3995977. The reversal of 3995971 is 1795993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1795993 = 109 ⋅16477.

It is a cyclic number.

It is not a de Polignac number, because 3995971 - 2⁷ = 3995843 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3995977) 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 3 ways as a sum of consecutive naturals, for example, 285420 + ... + 285433.

It is an arithmetic number, because the mean of its divisors is an integer number (1141708).

Almost surely, 2^3995971 is an apocalyptic number.

3995971 is a deficient number, since it is larger than the sum of its proper divisors (570861).

3995971 is an equidigital number, since it uses as much as digits as its factorization.

3995971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570860.

The product of its digits is 76545, while the sum is 43.

The square root of 3995971 is about 1998.9924962340. The cubic root of 3995971 is about 158.6867903020.

The spelling of 3995971 in words is "three million, nine hundred ninety-five thousand, nine hundred seventy-one".