12752778 has 8 divisors (see below), whose sum is σ = 25505568. Its totient is φ = 4250924.

The previous prime is 12752777. The next prime is 12752813. The reversal of 12752778 is 87725721.

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

12752778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12752777) 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, 1062726 + ... + 1062737.

It is an arithmetic number, because the mean of its divisors is an integer number (3188196).

Almost surely, 2^12752778 is an apocalyptic number.

12752778 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.

12752778 is a wasteful number, since it uses less digits than its factorization.

12752778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125468.

The product of its digits is 54880, while the sum is 39.

The square root of 12752778 is about 3571.1031908921. The cubic root of 12752778 is about 233.6334021519.

It can be divided in two parts, 12752 and 778, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 12752778 in words is "twelve million, seven hundred fifty-two thousand, seven hundred seventy-eight".