12478913 has 4 divisors (see below), whose sum is σ = 12690480. Its totient is φ = 12267348.

The previous prime is 12478909. The next prime is 12478933. The reversal of 12478913 is 31987421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12478913 - 2² = 12478909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12478933) 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, 105695 + ... + 105812.

It is an arithmetic number, because the mean of its divisors is an integer number (3172620).

Almost surely, 2^12478913 is an apocalyptic number.

It is an amenable number.

12478913 is a deficient number, since it is larger than the sum of its proper divisors (211567).

12478913 is an equidigital number, since it uses as much as digits as its factorization.

12478913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211566.

The product of its digits is 12096, while the sum is 35.

The square root of 12478913 is about 3532.5504950390. The cubic root of 12478913 is about 231.9488653157.

The spelling of 12478913 in words is "twelve million, four hundred seventy-eight thousand, nine hundred thirteen".