3571221 has 8 divisors (see below), whose sum is σ = 5012320. Its totient is φ = 2255472.

The previous prime is 3571199. The next prime is 3571237. The reversal of 3571221 is 1221753.

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

It is not a de Polignac number, because 3571221 - 2⁶ = 3571157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3571261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31270 + ... + 31383.

It is an arithmetic number, because the mean of its divisors is an integer number (626540).

Almost surely, 2^3571221 is an apocalyptic number.

It is an amenable number.

3571221 is a deficient number, since it is larger than the sum of its proper divisors (1441099).

3571221 is a wasteful number, since it uses less digits than its factorization.

3571221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62675.

The product of its digits is 420, while the sum is 21.

The square root of 3571221 is about 1889.7674460102. The cubic root of 3571221 is about 152.8523929913.

Adding to 3571221 its reverse (1221753), we get a palindrome (4792974).

The spelling of 3571221 in words is "three million, five hundred seventy-one thousand, two hundred twenty-one".