12387213 has 12 divisors (see below), whose sum is σ = 18230940. Its totient is φ = 8102016.

The previous prime is 12387149. The next prime is 12387217. The reversal of 12387213 is 31278321.

12387213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5322249 + 7064964 = 2307^2 + 2658^2 .

It is not a de Polignac number, because 12387213 - 2⁶ = 12387149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12508 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (1519245).

Almost surely, 2^12387213 is an apocalyptic number.

It is an amenable number.

12387213 is a deficient number, since it is larger than the sum of its proper divisors (5843727).

12387213 is a wasteful number, since it uses less digits than its factorization.

12387213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26028 (or 26025 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12387213 is about 3519.5472720224. The cubic root of 12387213 is about 231.3793172012.

The spelling of 12387213 in words is "twelve million, three hundred eighty-seven thousand, two hundred thirteen".