1438221 has 8 divisors (see below), whose sum is σ = 1962400. Its totient is φ = 936432.

The previous prime is 1438211. The next prime is 1438223. The reversal of 1438221 is 1228341.

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

It is not a de Polignac number, because 1438221 - 2⁷ = 1438093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438223) 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 7 ways as a sum of consecutive naturals, for example, 5446 + ... + 5703.

It is an arithmetic number, because the mean of its divisors is an integer number (245300).

2^1438221 is an apocalyptic number.

It is an amenable number.

1438221 is a deficient number, since it is larger than the sum of its proper divisors (524179).

1438221 is a wasteful number, since it uses less digits than its factorization.

1438221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195.

The product of its digits is 384, while the sum is 21.

The square root of 1438221 is about 1199.2585209203. The cubic root of 1438221 is about 112.8778014387.

The spelling of 1438221 in words is "one million, four hundred thirty-eight thousand, two hundred twenty-one".