12633021 has 24 divisors (see below), whose sum is σ = 19088160. Its totient is φ = 8042976.

The previous prime is 12633017. The next prime is 12633029. The reversal of 12633021 is 12033621.

12633021 is a `hidden beast` number, since 12 + 633 + 0 + 21 = 666.

12633021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12633021 - 2² = 12633017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12632985 and 12633003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12633029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19326 + ... + 19968.

It is an arithmetic number, because the mean of its divisors is an integer number (795340).

Almost surely, 2^12633021 is an apocalyptic number.

It is an amenable number.

12633021 is a deficient number, since it is larger than the sum of its proper divisors (6455139).

12633021 is a wasteful number, since it uses less digits than its factorization.

12633021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 12633021 is about 3554.2961328511. The cubic root of 12633021 is about 232.8997769947.

Adding to 12633021 its reverse (12033621), we get a palindrome (24666642).

The spelling of 12633021 in words is "twelve million, six hundred thirty-three thousand, twenty-one".