711221 has 4 divisors (see below), whose sum is σ = 812832. Its totient is φ = 609612.

The previous prime is 711209. The next prime is 711223. The reversal of 711221 is 122117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 711221 - 2¹⁸ = 449077 is a prime.

It is a super-4 number, since 4×711221⁴ (a number of 25 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 711196 and 711205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (711223) 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 3 ways as a sum of consecutive naturals, for example, 50795 + ... + 50808.

It is an arithmetic number, because the mean of its divisors is an integer number (203208).

2⁷¹¹²²¹ is an apocalyptic number.

It is an amenable number.

711221 is a deficient number, since it is larger than the sum of its proper divisors (101611).

711221 is a wasteful number, since it uses less digits than its factorization.

711221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101610.

The product of its digits is 28, while the sum is 14.

The square root of 711221 is about 843.3391962906. The cubic root of 711221 is about 89.2623241435.

Adding to 711221 its reverse (122117), we get a palindrome (833338).

The spelling of 711221 in words is "seven hundred eleven thousand, two hundred twenty-one", and thus it is an iban number.