12021436 has 24 divisors (see below), whose sum is σ = 24385536. Its totient is φ = 5078640.

The previous prime is 12021403. The next prime is 12021473. The reversal of 12021436 is 63412021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (1016064).

Almost surely, 2^12021436 is an apocalyptic number.

It is an amenable number.

12021436 is an abundant number, since it is smaller than the sum of its proper divisors (12364100).

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

12021436 is a wasteful number, since it uses less digits than its factorization.

12021436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129 (or 6127 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12021436 is about 3467.1942547253. The cubic root of 12021436 is about 229.0790901657.

Adding to 12021436 its reverse (63412021), we get a palindrome (75433457).

The spelling of 12021436 in words is "twelve million, twenty-one thousand, four hundred thirty-six".