1438421 has 8 divisors (see below), whose sum is σ = 1534464. Its totient is φ = 1343680.

The previous prime is 1438417. The next prime is 1438447. The reversal of 1438421 is 1248341.

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

It is not a de Polignac number, because 1438421 - 2² = 1438417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438721) 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 7 ways as a sum of consecutive naturals, for example, 3026 + ... + 3468.

It is an arithmetic number, because the mean of its divisors is an integer number (191808).

2^1438421 is an apocalyptic number.

It is an amenable number.

1438421 is a deficient number, since it is larger than the sum of its proper divisors (96043).

1438421 is a wasteful number, since it uses less digits than its factorization.

1438421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its digits is 768, while the sum is 23.

The square root of 1438421 is about 1199.3419028784. The cubic root of 1438421 is about 112.8830334844.

The spelling of 1438421 in words is "one million, four hundred thirty-eight thousand, four hundred twenty-one".