5421221 has 4 divisors (see below), whose sum is σ = 5838252. Its totient is φ = 5004192.

The previous prime is 5421209. The next prime is 5421263. The reversal of 5421221 is 1221245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2217121 + 3204100 = 1489^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 5421221 - 2¹⁴ = 5404837 is a prime.

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 5421221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421421) 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, 208496 + ... + 208521.

It is an arithmetic number, because the mean of its divisors is an integer number (1459563).

Almost surely, 2^5421221 is an apocalyptic number.

It is an amenable number.

5421221 is a deficient number, since it is larger than the sum of its proper divisors (417031).

5421221 is a wasteful number, since it uses less digits than its factorization.

5421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417030.

The product of its digits is 160, while the sum is 17.

The square root of 5421221 is about 2328.3515628015. The cubic root of 5421221 is about 175.6705808668.

Adding to 5421221 its reverse (1221245), we get a palindrome (6642466).

The spelling of 5421221 in words is "five million, four hundred twenty-one thousand, two hundred twenty-one".