12021892 has 24 divisors (see below), whose sum is σ = 22359960. Its totient is φ = 5644800.

The previous prime is 12021881. The next prime is 12021913. The reversal of 12021892 is 29812021.

It can be written as a sum of positive squares in 4 ways, for example, as 4260096 + 7761796 = 2064^2 + 2786^2 .

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, 2892 + ... + 5692.

It is an arithmetic number, because the mean of its divisors is an integer number (931665).

Almost surely, 2^12021892 is an apocalyptic number.

It is an amenable number.

12021892 is a deficient number, since it is larger than the sum of its proper divisors (10338068).

12021892 is a wasteful number, since it uses less digits than its factorization.

12021892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871 (or 2869 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12021892 is about 3467.2600133246. The cubic root of 12021892 is about 229.0819866235.

The spelling of 12021892 in words is "twelve million, twenty-one thousand, eight hundred ninety-two".