2721589 has 4 divisors (see below), whose sum is σ = 2930956. Its totient is φ = 2512224.

The previous prime is 2721577. The next prime is 2721619. The reversal of 2721589 is 9851272.

2721589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 1380625 = 1158^2 + 1175^2 .

It is not a de Polignac number, because 2721589 - 2⁵ = 2721557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781589) 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 in 3 ways as a sum of consecutive naturals, for example, 104664 + ... + 104689.

It is an arithmetic number, because the mean of its divisors is an integer number (732739).

2^2721589 is an apocalyptic number.

It is an amenable number.

2721589 is a deficient number, since it is larger than the sum of its proper divisors (209367).

2721589 is a wasteful number, since it uses less digits than its factorization.

2721589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209366.

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

The square root of 2721589 is about 1649.7239162963. The cubic root of 2721589 is about 139.6178181869.

The spelling of 2721589 in words is "two million, seven hundred twenty-one thousand, five hundred eighty-nine".