12660394 has 8 divisors (see below), whose sum is σ = 19040580. Its totient is φ = 6313536.

The previous prime is 12660377. The next prime is 12660409. The reversal of 12660394 is 49306621.

It can be written as a sum of positive squares in 2 ways, for example, as 12341169 + 319225 = 3513^2 + 565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7359 + ... + 8914.

Almost surely, 2^12660394 is an apocalyptic number.

12660394 is a deficient number, since it is larger than the sum of its proper divisors (6380186).

12660394 is a wasteful number, since it uses less digits than its factorization.

12660394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16664.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 12660394 is about 3558.1447412943. The cubic root of 12660394 is about 233.0678699789.

The spelling of 12660394 in words is "twelve million, six hundred sixty thousand, three hundred ninety-four".