12393021 has 16 divisors (see below), whose sum is σ = 17329536. Its totient is φ = 7862976.

The previous prime is 12393019. The next prime is 12393047. The reversal of 12393021 is 12039321.

It is a happy number.

It is not a de Polignac number, because 12393021 - 2¹ = 12393019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12393001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19911 + ... + 20523.

It is an arithmetic number, because the mean of its divisors is an integer number (1083096).

Almost surely, 2^12393021 is an apocalyptic number.

It is an amenable number.

12393021 is a deficient number, since it is larger than the sum of its proper divisors (4936515).

12393021 is a wasteful number, since it uses less digits than its factorization.

12393021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 12393021 is about 3520.3722814498. The cubic root of 12393021 is about 231.4154738706.

The spelling of 12393021 in words is "twelve million, three hundred ninety-three thousand, twenty-one".