12478764 has 12 divisors (see below), whose sum is σ = 29117144. Its totient is φ = 4159584.

The previous prime is 12478757. The next prime is 12478783. The reversal of 12478764 is 46787421.

It is a tau number, because it is divible by the number of its divisors (12).

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, 519937 + ... + 519960.

Almost surely, 2^12478764 is an apocalyptic number.

It is an amenable number.

12478764 is an abundant number, since it is smaller than the sum of its proper divisors (16638380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12478764 is a wasteful number, since it uses less digits than its factorization.

12478764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039904 (or 1039902 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 12478764 is about 3532.5294053978. The cubic root of 12478764 is about 231.9479421446.

It can be divided in two parts, 1247 and 8764, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 12478764 in words is "twelve million, four hundred seventy-eight thousand, seven hundred sixty-four".