2601125621 has 2 divisors, whose sum is σ = 2601125622. Its totient is φ = 2601125620.

The previous prime is 2601125609. The next prime is 2601125627. The reversal of 2601125621 is 1265211062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1806675025 + 794450596 = 42505^2 + 28186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2601125621 - 2¹⁸ = 2600863477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2601125627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300562810 + 1300562811.

It is an arithmetic number, because the mean of its divisors is an integer number (1300562811).

Almost surely, 2^2601125621 is an apocalyptic number.

It is an amenable number.

2601125621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2601125621 is an equidigital number, since it uses as much as digits as its factorization.

2601125621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2601125621 is about 51001.2315635613. The cubic root of 2601125621 is about 1375.2672751616.

Adding to 2601125621 its reverse (1265211062), we get a palindrome (3866336683).

The spelling of 2601125621 in words is "two billion, six hundred one million, one hundred twenty-five thousand, six hundred twenty-one".