2598721 has 2 divisors, whose sum is σ = 2598722. Its totient is φ = 2598720.

The previous prime is 2598707. The next prime is 2598731. The reversal of 2598721 is 1278952.

2598721 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., 2190400 + 408321 = 1480^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2598721 - 2⁵ = 2598689 is a prime.

It is not a weakly prime, because it can be changed into another prime (2598731) 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, 1299360 + 1299361.

It is an arithmetic number, because the mean of its divisors is an integer number (1299361).

2^2598721 is an apocalyptic number.

It is an amenable number.

2598721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2598721 is an equidigital number, since it uses as much as digits as its factorization.

2598721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 2598721 is about 1612.0548998096. The cubic root of 2598721 is about 137.4843354056.

The spelling of 2598721 in words is "two million, five hundred ninety-eight thousand, seven hundred twenty-one".