622421 has 16 divisors (see below), whose sum is σ = 725760. Its totient is φ = 529920.

The previous prime is 622399. The next prime is 622423. The reversal of 622421 is 124226.

It is a cyclic number.

It is not a de Polignac number, because 622421 - 2¹⁴ = 606037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 622421.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 622421.

It is not an unprimeable number, because it can be changed into a prime (622423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13220 + ... + 13266.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2⁶²²⁴²¹ is an apocalyptic number.

It is an amenable number.

622421 is a deficient number, since it is larger than the sum of its proper divisors (103339).

622421 is a wasteful number, since it uses less digits than its factorization.

622421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124.

The product of its digits is 192, while the sum is 17.

The square root of 622421 is about 788.9366260987. The cubic root of 622421 is about 85.3810344603.

Adding to 622421 its reverse (124226), we get a palindrome (746647).

The spelling of 622421 in words is "six hundred twenty-two thousand, four hundred twenty-one".