2721559 has 4 divisors (see below), whose sum is σ = 2736000. Its totient is φ = 2707120.

The previous prime is 2721557. The next prime is 2721577. The reversal of 2721559 is 9551272.

2721559 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 is a cyclic number.

It is not a de Polignac number, because 2721559 - 2¹ = 2721557 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2721559 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2721559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721553) 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, 6934 + ... + 7315.

It is an arithmetic number, because the mean of its divisors is an integer number (684000).

2^2721559 is an apocalyptic number.

2721559 is a deficient number, since it is larger than the sum of its proper divisors (14441).

2721559 is a wasteful number, since it uses less digits than its factorization.

2721559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14440.

The product of its digits is 6300, while the sum is 31.

The square root of 2721559 is about 1649.7148238408. The cubic root of 2721559 is about 139.6173051839.

The spelling of 2721559 in words is "two million, seven hundred twenty-one thousand, five hundred fifty-nine".