6501601 has 2 divisors, whose sum is σ = 6501602. Its totient is φ = 6501600.

The previous prime is 6501589. The next prime is 6501611. The reversal of 6501601 is 1061056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6275025 + 226576 = 2505^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 6501601 - 2⁵ = 6501569 is a prime.

It is not a weakly prime, because it can be changed into another prime (6501611) 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, 3250800 + 3250801.

It is an arithmetic number, because the mean of its divisors is an integer number (3250801).

Almost surely, 2^6501601 is an apocalyptic number.

It is an amenable number.

6501601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6501601 is an equidigital number, since it uses as much as digits as its factorization.

6501601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 6501601 is about 2549.8237193971. The cubic root of 6501601 is about 186.6408790198.

Adding to 6501601 its reverse (1061056), we get a palindrome (7562657).

The spelling of 6501601 in words is "six million, five hundred one thousand, six hundred one".