1921108 has 12 divisors (see below), whose sum is σ = 3842272. Its totient is φ = 823320.

The previous prime is 1921103. The next prime is 1921123. The reversal of 1921108 is 8011291.

1921108 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34278 + ... + 34333.

2^1921108 is an apocalyptic number.

It is an amenable number.

1921108 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1921108 is a wasteful number, since it uses less digits than its factorization.

1921108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68622 (or 68620 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1921108 is about 1386.0404034515. The cubic root of 1921108 is about 124.3132040685.

Adding to 1921108 its reverse (8011291), we get a palindrome (9932399).

The spelling of 1921108 in words is "one million, nine hundred twenty-one thousand, one hundred eight".