4021601 has 2 divisors, whose sum is σ = 4021602. Its totient is φ = 4021600.

The previous prime is 4021579. The next prime is 4021607. The reversal of 4021601 is 1061204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3996001 + 25600 = 1999^2 + 160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4021607) 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, 2010800 + 2010801.

It is an arithmetic number, because the mean of its divisors is an integer number (2010801).

Almost surely, 2^4021601 is an apocalyptic number.

It is an amenable number.

4021601 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021601 is an equidigital number, since it uses as much as digits as its factorization.

4021601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 4021601 is about 2005.3929789445. The cubic root of 4021601 is about 159.0253377866.

Adding to 4021601 its reverse (1061204), we get a palindrome (5082805).

The spelling of 4021601 in words is "four million, twenty-one thousand, six hundred one".