12378534 has 32 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 3414432.

The previous prime is 12378529. The next prime is 12378559. The reversal of 12378534 is 43587321.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12378495 and 12378504.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3864 + ... + 6299.

It is an arithmetic number, because the mean of its divisors is an integer number (914760).

Almost surely, 2^12378534 is an apocalyptic number.

12378534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12378534 is an abundant number, since it is smaller than the sum of its proper divisors (16893786).

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

12378534 is a wasteful number, since it uses less digits than its factorization.

12378534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10204.

The product of its digits is 20160, while the sum is 33.

The square root of 12378534 is about 3518.3140848992. The cubic root of 12378534 is about 231.3252665638.

The spelling of 12378534 in words is "twelve million, three hundred seventy-eight thousand, five hundred thirty-four".