2721206 has 8 divisors (see below), whose sum is σ = 4168800. Its totient is φ = 1331608.

The previous prime is 2721197. The next prime is 2721223. The reversal of 2721206 is 6021272.

2721206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14381 + ... + 14568.

It is an arithmetic number, because the mean of its divisors is an integer number (521100).

2^2721206 is an apocalyptic number.

2721206 is a deficient number, since it is larger than the sum of its proper divisors (1447594).

2721206 is a wasteful number, since it uses less digits than its factorization.

2721206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28998.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 2721206 is about 1649.6078321832. The cubic root of 2721206 is about 139.6112685654.

Adding to 2721206 its reverse (6021272), we get a palindrome (8742478).

The spelling of 2721206 in words is "two million, seven hundred twenty-one thousand, two hundred six".