12748213 has 4 divisors (see below), whose sum is σ = 12759340. Its totient is φ = 12737088.

The previous prime is 12748193. The next prime is 12748217. The reversal of 12748213 is 31284721.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 12341169 + 407044 = 3513^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 12748213 - 2⁹ = 12747701 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 (12748217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3618 + ... + 6211.

It is an arithmetic number, because the mean of its divisors is an integer number (3189835).

Almost surely, 2^12748213 is an apocalyptic number.

It is an amenable number.

12748213 is a deficient number, since it is larger than the sum of its proper divisors (11127).

12748213 is an equidigital number, since it uses as much as digits as its factorization.

12748213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11126.

The product of its digits is 2688, while the sum is 28.

The square root of 12748213 is about 3570.4639754519. The cubic root of 12748213 is about 233.6055215922.

It can be divided in two parts, 12 and 748213, that added together give a square (748225 = 865²).

The spelling of 12748213 in words is "twelve million, seven hundred forty-eight thousand, two hundred thirteen".