2720771 has 4 divisors (see below), whose sum is σ = 2736672. Its totient is φ = 2704872.

The previous prime is 2720747. The next prime is 2720789. The reversal of 2720771 is 1770272.

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 2720771 - 2¹⁰ = 2719747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2720771.

It is not an unprimeable number, because it can be changed into a prime (2720071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7691 + ... + 8036.

It is an arithmetic number, because the mean of its divisors is an integer number (684168).

2^2720771 is an apocalyptic number.

2720771 is a deficient number, since it is larger than the sum of its proper divisors (15901).

2720771 is a wasteful number, since it uses less digits than its factorization.

2720771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 2720771 is about 1649.4759773940. The cubic root of 2720771 is about 139.6038289549.

The spelling of 2720771 in words is "two million, seven hundred twenty thousand, seven hundred seventy-one".