2712721 has 4 divisors (see below), whose sum is σ = 2959344. Its totient is φ = 2466100.

The previous prime is 2712719. The next prime is 2712733. The reversal of 2712721 is 1272172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2712721 - 2¹ = 2712719 is a prime.

It is a Smith number, since the sum of its digits (22) 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.

It is a junction number, because it is equal to n+sod(n) for n = 2712692 and 2712701.

It is not an unprimeable number, because it can be changed into a prime (2713721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123295 + ... + 123316.

It is an arithmetic number, because the mean of its divisors is an integer number (739836).

2^2712721 is an apocalyptic number.

It is an amenable number.

2712721 is a deficient number, since it is larger than the sum of its proper divisors (246623).

2712721 is a wasteful number, since it uses less digits than its factorization.

2712721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246622.

The product of its digits is 392, while the sum is 22.

The square root of 2712721 is about 1647.0340008634. The cubic root of 2712721 is about 139.4660100554.

Adding to 2712721 its reverse (1272172), we get a palindrome (3984893).

It can be divided in two parts, 271 and 2721, that added together give a palindrome (2992).

The spelling of 2712721 in words is "two million, seven hundred twelve thousand, seven hundred twenty-one".