12021340 has 12 divisors (see below), whose sum is σ = 25244856. Its totient is φ = 4808528.

The previous prime is 12021311. The next prime is 12021353. The reversal of 12021340 is 4312021.

It is a self number, because there is not a number n which added to its sum of digits gives 12021340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300514 + ... + 300553.

It is an arithmetic number, because the mean of its divisors is an integer number (2103738).

Almost surely, 2^12021340 is an apocalyptic number.

12021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021340 is an abundant number, since it is smaller than the sum of its proper divisors (13223516).

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

12021340 is a wasteful number, since it uses less digits than its factorization.

12021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601076 (or 601074 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12021340 is about 3467.1804106507. The cubic root of 12021340 is about 229.0784803758.

Adding to 12021340 its reverse (4312021), we get a palindrome (16333361).

The spelling of 12021340 in words is "twelve million, twenty-one thousand, three hundred forty".