571221 has 12 divisors (see below), whose sum is σ = 943072. Its totient is φ = 326376.

The previous prime is 571211. The next prime is 571223. The reversal of 571221 is 122175.

It is not a de Polignac number, because 571221 - 2⁶ = 571157 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 571194 and 571203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (571223) 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 11 ways as a sum of consecutive naturals, for example, 4471 + ... + 4596.

2⁵⁷¹²²¹ is an apocalyptic number.

It is an amenable number.

571221 is a deficient number, since it is larger than the sum of its proper divisors (371851).

571221 is a wasteful number, since it uses less digits than its factorization.

571221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080 (or 9077 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 571221 is about 755.7916379532. The cubic root of 571221 is about 82.9726043035.

Adding to 571221 its reverse (122175), we get a palindrome (693396).

The spelling of 571221 in words is "five hundred seventy-one thousand, two hundred twenty-one".