4053221 has 4 divisors (see below), whose sum is σ = 4229472. Its totient is φ = 3876972.

The previous prime is 4053187. The next prime is 4053229. The reversal of 4053221 is 1223504.

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 de Polignac number, because none of the positive numbers 2^k-4053221 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4053221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4053229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88091 + ... + 88136.

It is an arithmetic number, because the mean of its divisors is an integer number (1057368).

Almost surely, 2^4053221 is an apocalyptic number.

It is an amenable number.

4053221 is a deficient number, since it is larger than the sum of its proper divisors (176251).

4053221 is a wasteful number, since it uses less digits than its factorization.

4053221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176250.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 4053221 is about 2013.2612845828. The cubic root of 4053221 is about 159.4410312570.

Adding to 4053221 its reverse (1223504), we get a palindrome (5276725).

The spelling of 4053221 in words is "four million, fifty-three thousand, two hundred twenty-one".