4031641 has 2 divisors, whose sum is σ = 4031642. Its totient is φ = 4031640.

The previous prime is 4031639. The next prime is 4031681. The reversal of 4031641 is 1461304.

It is a happy number.

4031641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4016016 + 15625 = 2004^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 4031641 - 2¹ = 4031639 is a prime.

Together with 4031639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4031681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015820 + 2015821.

It is an arithmetic number, because the mean of its divisors is an integer number (2015821).

Almost surely, 2^4031641 is an apocalyptic number.

It is an amenable number.

4031641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4031641 is an equidigital number, since it uses as much as digits as its factorization.

4031641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 4031641 is about 2007.8946685521. The cubic root of 4031641 is about 159.1575643610.

Adding to 4031641 its reverse (1461304), we get a palindrome (5492945).

The spelling of 4031641 in words is "four million, thirty-one thousand, six hundred forty-one".