4223121 has 8 divisors (see below), whose sum is σ = 6435264. Its totient is φ = 2413200.

The previous prime is 4223117. The next prime is 4223171. The reversal of 4223121 is 1213224.

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

It is not a de Polignac number, because 4223121 - 2² = 4223117 is a prime.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 4223121.

It is not an unprimeable number, because it can be changed into a prime (4223171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100530 + ... + 100571.

It is an arithmetic number, because the mean of its divisors is an integer number (804408).

Almost surely, 2^4223121 is an apocalyptic number.

It is an amenable number.

4223121 is a deficient number, since it is larger than the sum of its proper divisors (2212143).

4223121 is a wasteful number, since it uses less digits than its factorization.

4223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201111.

The product of its digits is 96, while the sum is 15.

The square root of 4223121 is about 2055.0233575315. The cubic root of 4223121 is about 161.6383871367.

Subtracting from 4223121 its product of digits (96), we obtain a square (4223025 = 2055²).

Adding to 4223121 its reverse (1213224), we get a palindrome (5436345).

The spelling of 4223121 in words is "four million, two hundred twenty-three thousand, one hundred twenty-one".