2720555 has 16 divisors (see below), whose sum is σ = 3495744. Its totient is φ = 2027520.

The previous prime is 2720551. The next prime is 2720563. The reversal of 2720555 is 5550272.

It is not a de Polignac number, because 2720555 - 2² = 2720551 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2720551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4427 + ... + 5003.

It is an arithmetic number, because the mean of its divisors is an integer number (218484).

2^2720555 is an apocalyptic number.

2720555 is a deficient number, since it is larger than the sum of its proper divisors (775189).

2720555 is a wasteful number, since it uses less digits than its factorization.

2720555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 2720555 is about 1649.4105007547. The cubic root of 2720555 is about 139.6001345089.

The spelling of 2720555 in words is "two million, seven hundred twenty thousand, five hundred fifty-five".