3995961 has 4 divisors (see below), whose sum is σ = 5327952. Its totient is φ = 2663972.

The previous prime is 3995941. The next prime is 3995977. The reversal of 3995961 is 1695993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3995961 - 2⁶ = 3995897 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3995921) 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, 665991 + ... + 665996.

It is an arithmetic number, because the mean of its divisors is an integer number (1331988).

Almost surely, 2^3995961 is an apocalyptic number.

It is an amenable number.

3995961 is a deficient number, since it is larger than the sum of its proper divisors (1331991).

3995961 is a wasteful number, since it uses less digits than its factorization.

3995961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331990.

The product of its digits is 65610, while the sum is 42.

The square root of 3995961 is about 1998.9899949725. The cubic root of 3995961 is about 158.6866579296.

Subtracting from 3995961 its reverse (1695993), we obtain a cube (2299968 = 132³).

The spelling of 3995961 in words is "three million, nine hundred ninety-five thousand, nine hundred sixty-one".