6511601 has 2 divisors, whose sum is σ = 6511602. Its totient is φ = 6511600.

The previous prime is 6511597. The next prime is 6511621. The reversal of 6511601 is 1061156.

It is a happy number.

It is an a-pointer prime, because the next prime (6511621) can be obtained adding 6511601 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 361201 = 2480^2 + 601^2 .

It is a cyclic number.

It is not a de Polignac number, because 6511601 - 2² = 6511597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6511621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255800 + 3255801.

It is an arithmetic number, because the mean of its divisors is an integer number (3255801).

Almost surely, 2^6511601 is an apocalyptic number.

It is an amenable number.

6511601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511601 is an equidigital number, since it uses as much as digits as its factorization.

6511601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 6511601 is about 2551.7838858336. The cubic root of 6511601 is about 186.7365197044.

Adding to 6511601 its reverse (1061156), we get a palindrome (7572757).

The spelling of 6511601 in words is "six million, five hundred eleven thousand, six hundred one".