3572221 has 8 divisors (see below), whose sum is σ = 3663704. Its totient is φ = 3481920.

The previous prime is 3572203. The next prime is 3572243. The reversal of 3572221 is 1222753.

It can be written as a sum of positive squares in 4 ways, for example, as 121 + 3572100 = 11^2 + 1890^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3572221 - 2⁵ = 3572189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3572192 and 3572201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3572321) 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, 9391 + ... + 9763.

It is an arithmetic number, because the mean of its divisors is an integer number (457963).

Almost surely, 2^3572221 is an apocalyptic number.

It is an amenable number.

3572221 is a deficient number, since it is larger than the sum of its proper divisors (91483).

3572221 is a wasteful number, since it uses less digits than its factorization.

3572221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591.

The product of its digits is 840, while the sum is 22.

The square root of 3572221 is about 1890.0320103109. The cubic root of 3572221 is about 152.8666587124.

Adding to 3572221 its reverse (1222753), we get a palindrome (4794974).

The spelling of 3572221 in words is "three million, five hundred seventy-two thousand, two hundred twenty-one".