12021772 has 12 divisors (see below), whose sum is σ = 24043600. Its totient is φ = 5152176.

The previous prime is 12021761. The next prime is 12021797. The reversal of 12021772 is 27712021.

12021772 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, 214647 + ... + 214702.

Almost surely, 2^12021772 is an apocalyptic number.

It is an amenable number.

12021772 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.

12021772 is a wasteful number, since it uses less digits than its factorization.

12021772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429360 (or 429358 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 12021772 is about 3467.2427085510. The cubic root of 12021772 is about 229.0812244049.

Adding to 12021772 its reverse (27712021), we get a palindrome (39733793).

The spelling of 12021772 in words is "twelve million, twenty-one thousand, seven hundred seventy-two".