12778134 has 8 divisors (see below), whose sum is σ = 25556280. Its totient is φ = 4259376.

The previous prime is 12778121. The next prime is 12778147. The reversal of 12778134 is 43187721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12778121) and next prime (12778147).

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

12778134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12778095 and 12778104.

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 3 ways as a sum of consecutive naturals, for example, 1064839 + ... + 1064850.

It is an arithmetic number, because the mean of its divisors is an integer number (3194535).

Almost surely, 2^12778134 is an apocalyptic number.

12778134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12778134 is a wasteful number, since it uses less digits than its factorization.

12778134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129694.

The product of its digits is 9408, while the sum is 33.

The square root of 12778134 is about 3574.6515914142. The cubic root of 12778134 is about 233.7881419452.

The spelling of 12778134 in words is "twelve million, seven hundred seventy-eight thousand, one hundred thirty-four".