6144221 has 4 divisors (see below), whose sum is σ = 6200700. Its totient is φ = 6087744.

The previous prime is 6144211. The next prime is 6144223. The reversal of 6144221 is 1224416.

6144221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2088025 + 4056196 = 1445^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 6144221 - 2¹⁰ = 6143197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6144193 and 6144202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6144223) 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 3 ways as a sum of consecutive naturals, for example, 28076 + ... + 28293.

It is an arithmetic number, because the mean of its divisors is an integer number (1550175).

Almost surely, 2^6144221 is an apocalyptic number.

It is an amenable number.

6144221 is a deficient number, since it is larger than the sum of its proper divisors (56479).

6144221 is a wasteful number, since it uses less digits than its factorization.

6144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56478.

The product of its digits is 384, while the sum is 20.

The square root of 6144221 is about 2478.7539208239. The cubic root of 6144221 is about 183.1564748052.

Adding to 6144221 its reverse (1224416), we get a palindrome (7368637).

The spelling of 6144221 in words is "six million, one hundred forty-four thousand, two hundred twenty-one".