3711221 has 2 divisors, whose sum is σ = 3711222. Its totient is φ = 3711220.

The previous prime is 3711209. The next prime is 3711229. The reversal of 3711221 is 1221173.

3711221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 972196 = 1655^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 3711221 - 2⁶ = 3711157 is a prime.

It is a super-2 number, since 2×3711221² = 27546322621682, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3711221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3711229) 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 as a sum of consecutive naturals, namely, 1855610 + 1855611.

It is an arithmetic number, because the mean of its divisors is an integer number (1855611).

Almost surely, 2^3711221 is an apocalyptic number.

It is an amenable number.

3711221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3711221 is an equidigital number, since it uses as much as digits as its factorization.

3711221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 17.

The square root of 3711221 is about 1926.4529581591. The cubic root of 3711221 is about 154.8242336428.

Adding to 3711221 its reverse (1221173), we get a palindrome (4932394).

The spelling of 3711221 in words is "three million, seven hundred eleven thousand, two hundred twenty-one".