4228121 has 16 divisors (see below), whose sum is σ = 4727808. Its totient is φ = 3763200.

The previous prime is 4228111. The next prime is 4228141. The reversal of 4228121 is 1218224.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4228121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4228093 and 4228102.

It is not an unprimeable number, because it can be changed into a prime (4228111) 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, 37361 + ... + 37473.

It is an arithmetic number, because the mean of its divisors is an integer number (295488).

Almost surely, 2^4228121 is an apocalyptic number.

It is an amenable number.

4228121 is a deficient number, since it is larger than the sum of its proper divisors (499687).

4228121 is a wasteful number, since it uses less digits than its factorization.

4228121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its digits is 256, while the sum is 20.

The square root of 4228121 is about 2056.2395288487. The cubic root of 4228121 is about 161.7021530254.

The spelling of 4228121 in words is "four million, two hundred twenty-eight thousand, one hundred twenty-one".