12778074 has 20 divisors (see below), whose sum is σ = 28632714. Its totient is φ = 4259304.

The previous prime is 12778069. The next prime is 12778079. The reversal of 12778074 is 47087721.

It is an interprime number because it is at equal distance from previous prime (12778069) and next prime (12778079).

It can be written as a sum of positive squares in only one way, i.e., 11512449 + 1265625 = 3393^2 + 1125^2 .

It is not an unprimeable number, because it can be changed into a prime (12778079) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 39277 + ... + 39600.

Almost surely, 2^12778074 is an apocalyptic number.

12778074 is an abundant number, since it is smaller than the sum of its proper divisors (15854640).

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

12778074 is an equidigital number, since it uses as much as digits as its factorization.

12778074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78891 (or 78882 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 12778074 is about 3574.6431989780. The cubic root of 12778074 is about 233.7877760256.

The spelling of 12778074 in words is "twelve million, seven hundred seventy-eight thousand, seventy-four".