1921892 has 12 divisors (see below), whose sum is σ = 3843840. Its totient is φ = 823656.

The previous prime is 1921889. The next prime is 1921919. The reversal of 1921892 is 2981291.

It is a happy number.

1921892 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 34292 + ... + 34347.

It is an arithmetic number, because the mean of its divisors is an integer number (320320).

2^1921892 is an apocalyptic number.

It is an amenable number.

1921892 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.

1921892 is a wasteful number, since it uses less digits than its factorization.

1921892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68650 (or 68648 counting only the distinct ones).

The product of its digits is 2592, while the sum is 32.

The square root of 1921892 is about 1386.3231946411. The cubic root of 1921892 is about 124.3301124181.

The spelling of 1921892 in words is "one million, nine hundred twenty-one thousand, eight hundred ninety-two".