2721873 has 16 divisors (see below), whose sum is σ = 4525056. Its totient is φ = 1413840.

The previous prime is 2721871. The next prime is 2721877. The reversal of 2721873 is 3781272.

It is not a de Polignac number, because 2721873 - 2¹ = 2721871 is a prime.

2721873 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2721873.

It is not an unprimeable number, because it can be changed into a prime (2721871) 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, 5661 + ... + 6122.

It is an arithmetic number, because the mean of its divisors is an integer number (282816).

2^2721873 is an apocalyptic number.

It is an amenable number.

2721873 is a deficient number, since it is larger than the sum of its proper divisors (1803183).

2721873 is a wasteful number, since it uses less digits than its factorization.

2721873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11804.

The product of its digits is 4704, while the sum is 30.

The square root of 2721873 is about 1649.8099890593. The cubic root of 2721873 is about 139.6226744285.

It can be divided in two parts, 272 and 1873, that added together give a triangular number (2145 = T₆₅).

The spelling of 2721873 in words is "two million, seven hundred twenty-one thousand, eight hundred seventy-three".