3996541 has 2 divisors, whose sum is σ = 3996542. Its totient is φ = 3996540.

The previous prime is 3996529. The next prime is 3996569. The reversal of 3996541 is 1456993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2627641 + 1368900 = 1621^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 3996541 - 2⁷ = 3996413 is a prime.

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 3996541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3996511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998270 + 1998271.

It is an arithmetic number, because the mean of its divisors is an integer number (1998271).

Almost surely, 2^3996541 is an apocalyptic number.

It is an amenable number.

3996541 is a deficient number, since it is larger than the sum of its proper divisors (1).

3996541 is an equidigital number, since it uses as much as digits as its factorization.

3996541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 3996541 is about 1999.1350629710. The cubic root of 3996541 is about 158.6943351657.

It can be divided in two parts, 39 and 96541, that added together give a triangular number (96580 = T₄₃₉).

The spelling of 3996541 in words is "three million, nine hundred ninety-six thousand, five hundred forty-one".