12145213 has 4 divisors (see below), whose sum is σ = 12473500. Its totient is φ = 11816928.

The previous prime is 12145201. The next prime is 12145241. The reversal of 12145213 is 31254121.

12145213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11108889 + 1036324 = 3333^2 + 1018^2 .

It is a cyclic number.

It is not a de Polignac number, because 12145213 - 2⁹ = 12144701 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 (12145013) 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, 164088 + ... + 164161.

It is an arithmetic number, because the mean of its divisors is an integer number (3118375).

Almost surely, 2^12145213 is an apocalyptic number.

It is an amenable number.

12145213 is a deficient number, since it is larger than the sum of its proper divisors (328287).

12145213 is an equidigital number, since it uses as much as digits as its factorization.

12145213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328286.

The product of its digits is 240, while the sum is 19.

The square root of 12145213 is about 3484.9982783353. The cubic root of 12145213 is about 229.8626337911.

Adding to 12145213 its reverse (31254121), we get a palindrome (43399334).

The spelling of 12145213 in words is "twelve million, one hundred forty-five thousand, two hundred thirteen".