12750978 has 8 divisors (see below), whose sum is σ = 25501968. Its totient is φ = 4250324.

The previous prime is 12750911. The next prime is 12750989. The reversal of 12750978 is 87905721.

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

12750978 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062576 + ... + 1062587.

It is an arithmetic number, because the mean of its divisors is an integer number (3187746).

Almost surely, 2^12750978 is an apocalyptic number.

12750978 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.

12750978 is a wasteful number, since it uses less digits than its factorization.

12750978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125168.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 12750978 is about 3570.8511590376. The cubic root of 12750978 is about 233.6224095167.

The spelling of 12750978 in words is "twelve million, seven hundred fifty thousand, nine hundred seventy-eight".