1921834 has 16 divisors (see below), whose sum is σ = 3084480. Its totient is φ = 895840.

The previous prime is 1921823. The next prime is 1921841. The reversal of 1921834 is 4381291.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 1377 + ... + 2395.

It is an arithmetic number, because the mean of its divisors is an integer number (192780).

2^1921834 is an apocalyptic number.

1921834 is a deficient number, since it is larger than the sum of its proper divisors (1162646).

1921834 is a wasteful number, since it uses less digits than its factorization.

1921834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085.

The product of its digits is 1728, while the sum is 28.

The square root of 1921834 is about 1386.3022758403. The cubic root of 1921834 is about 124.3288617028.

The spelling of 1921834 in words is "one million, nine hundred twenty-one thousand, eight hundred thirty-four".