12945223 has 4 divisors (see below), whose sum is σ = 13391640. Its totient is φ = 12498808.

The previous prime is 12945221. The next prime is 12945239. The reversal of 12945223 is 32254921.

12945223 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 32254921 = 4643 ⋅6947.

It is a cyclic number.

It is not a de Polignac number, because 12945223 - 2¹ = 12945221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12945191 and 12945200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12945221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223165 + ... + 223222.

It is an arithmetic number, because the mean of its divisors is an integer number (3347910).

Almost surely, 2^12945223 is an apocalyptic number.

12945223 is a deficient number, since it is larger than the sum of its proper divisors (446417).

12945223 is an equidigital number, since it uses as much as digits as its factorization.

12945223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446416.

The product of its digits is 4320, while the sum is 28.

The square root of 12945223 is about 3597.9470535293. The cubic root of 12945223 is about 234.8027498282.

The spelling of 12945223 in words is "twelve million, nine hundred forty-five thousand, two hundred twenty-three".