2706221 has 6 divisors (see below), whose sum is σ = 3148110. Its totient is φ = 2319576.

The previous prime is 2706211. The next prime is 2706241. The reversal of 2706221 is 1226072.

2706221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2706025 + 196 = 1645^2 + 14^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2706221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2706193 and 2706202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2706211) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 27566 + ... + 27663.

It is an arithmetic number, because the mean of its divisors is an integer number (524685).

2^2706221 is an apocalyptic number.

It is an amenable number.

2706221 is a deficient number, since it is larger than the sum of its proper divisors (441889).

2706221 is an equidigital number, since it uses as much as digits as its factorization.

2706221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55243 (or 55236 counting only the distinct ones).

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

The square root of 2706221 is about 1645.0595733894. The cubic root of 2706221 is about 139.3545286214.

The spelling of 2706221 in words is "two million, seven hundred six thousand, two hundred twenty-one".