2511601 has 2 divisors, whose sum is σ = 2511602. Its totient is φ = 2511600.

The previous prime is 2511581. The next prime is 2511637. The reversal of 2511601 is 1061152.

It is a happy number.

2511601 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., 2480625 + 30976 = 1575^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 2511601 - 2⁵ = 2511569 is a prime.

It is not a weakly prime, because it can be changed into another prime (2511001) 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, 1255800 + 1255801.

It is an arithmetic number, because the mean of its divisors is an integer number (1255801).

2^2511601 is an apocalyptic number.

It is an amenable number.

2511601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2511601 is an equidigital number, since it uses as much as digits as its factorization.

2511601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2511601 is about 1584.8031423492. The cubic root of 2511601 is about 135.9304899983.

Adding to 2511601 its reverse (1061152), we get a palindrome (3572753).

The spelling of 2511601 in words is "two million, five hundred eleven thousand, six hundred one".