3995281 has 2 divisors, whose sum is σ = 3995282. Its totient is φ = 3995280.

The previous prime is 3995279. The next prime is 3995347. The reversal of 3995281 is 1825993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2944656 + 1050625 = 1716^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 3995281 - 2¹ = 3995279 is a prime.

It is a super-2 number, since 2×3995281² = 31924540537922, which contains 22 as substring.

Together with 3995279, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3995281.

It is not a weakly prime, because it can be changed into another prime (3995231) 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 as a sum of consecutive naturals, namely, 1997640 + 1997641.

It is an arithmetic number, because the mean of its divisors is an integer number (1997641).

Almost surely, 2^3995281 is an apocalyptic number.

It is an amenable number.

3995281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3995281 is an equidigital number, since it uses as much as digits as its factorization.

3995281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 3995281 is about 1998.8199018421. The cubic root of 3995281 is about 158.6776560859.

The spelling of 3995281 in words is "three million, nine hundred ninety-five thousand, two hundred eighty-one".