1921382 has 4 divisors (see below), whose sum is σ = 2882076. Its totient is φ = 960690.

The previous prime is 1921363. The next prime is 1921393. The reversal of 1921382 is 2831291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2831291 = 139 ⋅20369.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 480344 + ... + 480347.

It is an arithmetic number, because the mean of its divisors is an integer number (720519).

2^1921382 is an apocalyptic number.

1921382 is a deficient number, since it is larger than the sum of its proper divisors (960694).

1921382 is an equidigital number, since it uses as much as digits as its factorization.

1921382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960693.

The product of its digits is 864, while the sum is 26.

The square root of 1921382 is about 1386.1392426448. The cubic root of 1921382 is about 124.3191138869.

Subtracting 1921382 from its reverse (2831291), we obtain a palindrome (909909).

The spelling of 1921382 in words is "one million, nine hundred twenty-one thousand, three hundred eighty-two".