4228621 has 8 divisors (see below), whose sum is σ = 4470080. Its totient is φ = 3989088.

The previous prime is 4228613. The next prime is 4228649. The reversal of 4228621 is 1268224.

It is a happy number.

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

It is not a de Polignac number, because 4228621 - 2³ = 4228613 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4208621) 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, 8440 + ... + 8926.

It is an arithmetic number, because the mean of its divisors is an integer number (558760).

Almost surely, 2^4228621 is an apocalyptic number.

It is an amenable number.

4228621 is a deficient number, since it is larger than the sum of its proper divisors (241459).

4228621 is a wasteful number, since it uses less digits than its factorization.

4228621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963.

The product of its digits is 1536, while the sum is 25.

The square root of 4228621 is about 2056.3611064208. The cubic root of 4228621 is about 161.7085268488.

The spelling of 4228621 in words is "four million, two hundred twenty-eight thousand, six hundred twenty-one".