12578473 has 4 divisors (see below), whose sum is σ = 12586068. Its totient is φ = 12570880.

The previous prime is 12578471. The next prime is 12578477. The reversal of 12578473 is 37487521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 37487521 = 677 ⋅55373.

It can be written as a sum of positive squares in 2 ways, for example, as 4214809 + 8363664 = 2053^2 + 2892^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578473 - 2¹ = 12578471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12578471) 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, 136 + ... + 5017.

It is an arithmetic number, because the mean of its divisors is an integer number (3146517).

Almost surely, 2^12578473 is an apocalyptic number.

It is an amenable number.

12578473 is a deficient number, since it is larger than the sum of its proper divisors (7595).

12578473 is an equidigital number, since it uses as much as digits as its factorization.

12578473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594.

The product of its digits is 47040, while the sum is 37.

The square root of 12578473 is about 3546.6143009919. The cubic root of 12578473 is about 232.5640814614.

It can be divided in two parts, 1257 and 8473, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 12578473 in words is "twelve million, five hundred seventy-eight thousand, four hundred seventy-three".