12378634 has 8 divisors (see below), whose sum is σ = 18664740. Its totient is φ = 6157056.

The previous prime is 12378631. The next prime is 12378647. The reversal of 12378634 is 43687321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12355225 + 23409 = 3515^2 + 153^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12378634.

It is not an unprimeable number, because it can be changed into a prime (12378631) by changing a digit.

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, 15649 + ... + 16420.

Almost surely, 2^12378634 is an apocalyptic number.

12378634 is a deficient number, since it is larger than the sum of its proper divisors (6286106).

12378634 is a wasteful number, since it uses less digits than its factorization.

12378634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32264.

The product of its digits is 24192, while the sum is 34.

The square root of 12378634 is about 3518.3282962225. The cubic root of 12378634 is about 231.3258894826.

The spelling of 12378634 in words is "twelve million, three hundred seventy-eight thousand, six hundred thirty-four".