4153221 has 16 divisors (see below), whose sum is σ = 6217920. Its totient is φ = 2739600.

The previous prime is 4153217. The next prime is 4153223. The reversal of 4153221 is 1223514.

It is not a de Polignac number, because 4153221 - 2² = 4153217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4153194 and 4153203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4153223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966 + ... + 3488.

It is an arithmetic number, because the mean of its divisors is an integer number (388620).

Almost surely, 2^4153221 is an apocalyptic number.

It is an amenable number.

4153221 is a deficient number, since it is larger than the sum of its proper divisors (2064699).

4153221 is a wasteful number, since it uses less digits than its factorization.

4153221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1627 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 4153221 is about 2037.9452887651. The cubic root of 4153221 is about 160.7416222706.

Adding to 4153221 its reverse (1223514), we get a palindrome (5376735).

The spelling of 4153221 in words is "four million, one hundred fifty-three thousand, two hundred twenty-one".