1938321 has 24 divisors (see below), whose sum is σ = 3491904. Its totient is φ = 1006560.

The previous prime is 1938317. The next prime is 1938359. The reversal of 1938321 is 1238391.

It is not a de Polignac number, because 1938321 - 2² = 1938317 is a prime.

1938321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1938301) 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 23 ways as a sum of consecutive naturals, for example, 706 + ... + 2091.

It is an arithmetic number, because the mean of its divisors is an integer number (145496).

2^1938321 is an apocalyptic number.

1938321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1938321 is a deficient number, since it is larger than the sum of its proper divisors (1553583).

1938321 is a wasteful number, since it uses less digits than its factorization.

1938321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821 (or 2818 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1938321 is about 1392.2359713784. The cubic root of 1938321 is about 124.6833800248.

The spelling of 1938321 in words is "one million, nine hundred thirty-eight thousand, three hundred twenty-one".