12945055 has 4 divisors (see below), whose sum is σ = 15534072. Its totient is φ = 10356040.

The previous prime is 12945047. The next prime is 12945077. The reversal of 12945055 is 55054921.

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

It is not a de Polignac number, because 12945055 - 2³ = 12945047 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1294501 + ... + 1294510.

It is an arithmetic number, because the mean of its divisors is an integer number (3883518).

Almost surely, 2^12945055 is an apocalyptic number.

12945055 is a deficient number, since it is larger than the sum of its proper divisors (2589017).

12945055 is an equidigital number, since it uses as much as digits as its factorization.

12945055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589016.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 12945055 is about 3597.9237068065. The cubic root of 12945055 is about 234.8017340859.

Adding to 12945055 its reverse (55054921), we get a palindrome (67999976).

The spelling of 12945055 in words is "twelve million, nine hundred forty-five thousand, fifty-five".