12983021 has 4 divisors (see below), whose sum is σ = 12992700. Its totient is φ = 12973344.

The previous prime is 12982999. The next prime is 12983051. The reversal of 12983021 is 12038921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12038921 = 191 ⋅63031.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 7155625 = 2414^2 + 2675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12983021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12983051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2426 + ... + 5643.

It is an arithmetic number, because the mean of its divisors is an integer number (3248175).

Almost surely, 2^12983021 is an apocalyptic number.

It is an amenable number.

12983021 is a deficient number, since it is larger than the sum of its proper divisors (9679).

12983021 is an equidigital number, since it uses as much as digits as its factorization.

12983021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9678.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12983021 is about 3603.1959424933. The cubic root of 12983021 is about 235.0310567073.

The spelling of 12983021 in words is "twelve million, nine hundred eighty-three thousand, twenty-one".