4222421 has 4 divisors (see below), whose sum is σ = 4825632. Its totient is φ = 3619212.

The previous prime is 4222399. The next prime is 4222483. The reversal of 4222421 is 1242224.

It is a happy number.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4222421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4222421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301595 + ... + 301608.

It is an arithmetic number, because the mean of its divisors is an integer number (1206408).

Almost surely, 2^4222421 is an apocalyptic number.

It is an amenable number.

4222421 is a deficient number, since it is larger than the sum of its proper divisors (603211).

4222421 is an equidigital number, since it uses as much as digits as its factorization.

4222421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603210.

The product of its digits is 256, while the sum is 17.

The square root of 4222421 is about 2054.8530361074. The cubic root of 4222421 is about 161.6294558966.

Adding to 4222421 its reverse (1242224), we get a palindrome (5464645).

The spelling of 4222421 in words is "four million, two hundred twenty-two thousand, four hundred twenty-one".