12478911 has 4 divisors (see below), whose sum is σ = 16638552. Its totient is φ = 8319272.

The previous prime is 12478909. The next prime is 12478933. The reversal of 12478911 is 11987421.

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

It is a cyclic number.

It is not a de Polignac number, because 12478911 - 2¹ = 12478909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12478981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2079816 + ... + 2079821.

It is an arithmetic number, because the mean of its divisors is an integer number (4159638).

Almost surely, 2^12478911 is an apocalyptic number.

12478911 is a deficient number, since it is larger than the sum of its proper divisors (4159641).

12478911 is an equidigital number, since it uses as much as digits as its factorization.

12478911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159640.

The product of its digits is 4032, while the sum is 33.

The square root of 12478911 is about 3532.5502119574. The cubic root of 12478911 is about 231.9488529242.

The spelling of 12478911 in words is "twelve million, four hundred seventy-eight thousand, nine hundred eleven".