2594128721 has 2 divisors, whose sum is σ = 2594128722. Its totient is φ = 2594128720.

The previous prime is 2594128673. The next prime is 2594128723. The reversal of 2594128721 is 1278214952.

2594128721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2482530625 + 111598096 = 49825^2 + 10564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2594128721 is a prime.

It is a super-2 number, since 2×2594128721² = 13459007642234191682, which contains 22 as substring.

Together with 2594128723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2594128723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1297064360 + 1297064361.

It is an arithmetic number, because the mean of its divisors is an integer number (1297064361).

Almost surely, 2^2594128721 is an apocalyptic number.

It is an amenable number.

2594128721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2594128721 is an equidigital number, since it uses as much as digits as its factorization.

2594128721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 2594128721 is about 50932.5899694881. The cubic root of 2594128721 is about 1374.0330340379.

The spelling of 2594128721 in words is "two billion, five hundred ninety-four million, one hundred twenty-eight thousand, seven hundred twenty-one".