2959721 has 4 divisors (see below), whose sum is σ = 2972244. Its totient is φ = 2947200.

The previous prime is 2959703. The next prime is 2959739. The reversal of 2959721 is 1279592.

2959721 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 an interprime number because it is at equal distance from previous prime (2959703) and next prime (2959739).

It can be written as a sum of positive squares in 2 ways, for example, as 2418025 + 541696 = 1555^2 + 736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2959721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2959771) 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, 5900 + ... + 6381.

It is an arithmetic number, because the mean of its divisors is an integer number (743061).

2^2959721 is an apocalyptic number.

It is an amenable number.

2959721 is a deficient number, since it is larger than the sum of its proper divisors (12523).

2959721 is a wasteful number, since it uses less digits than its factorization.

2959721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12522.

The product of its digits is 11340, while the sum is 35.

The square root of 2959721 is about 1720.3839687698. The cubic root of 2959721 is about 143.5765757371.

The spelling of 2959721 in words is "two million, nine hundred fifty-nine thousand, seven hundred twenty-one".