12780752 has 20 divisors (see below), whose sum is σ = 24985380. Its totient is φ = 6332928.

The previous prime is 12780743. The next prime is 12780763. The reversal of 12780752 is 25708721.

It can be written as a sum of positive squares in 2 ways, for example, as 1784896 + 10995856 = 1336^2 + 3316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727 + ... + 5342.

It is an arithmetic number, because the mean of its divisors is an integer number (1249269).

Almost surely, 2^12780752 is an apocalyptic number.

It is an amenable number.

12780752 is a deficient number, since it is larger than the sum of its proper divisors (12204628).

12780752 is a wasteful number, since it uses less digits than its factorization.

12780752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7190 (or 7184 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 12780752 is about 3575.0177621936. The cubic root of 12780752 is about 233.8041071235.

The spelling of 12780752 in words is "twelve million, seven hundred eighty thousand, seven hundred fifty-two".