2721284 has 6 divisors (see below), whose sum is σ = 4762254. Its totient is φ = 1360640.

The previous prime is 2721259. The next prime is 2721307. The reversal of 2721284 is 4821272.

It can be written as a sum of positive squares in only one way, i.e., 2689600 + 31684 = 1640^2 + 178^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 340157 + ... + 340164.

It is an arithmetic number, because the mean of its divisors is an integer number (793709).

2^2721284 is an apocalyptic number.

It is an amenable number.

2721284 is a deficient number, since it is larger than the sum of its proper divisors (2040970).

2721284 is a wasteful number, since it uses less digits than its factorization.

2721284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680325 (or 680323 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 2721284 is about 1649.6314739965. The cubic root of 2721284 is about 139.6126024807.

The spelling of 2721284 in words is "two million, seven hundred twenty-one thousand, two hundred eighty-four".