12788507 has 4 divisors (see below), whose sum is σ = 13229520. Its totient is φ = 12347496.

The previous prime is 12788497. The next prime is 12788513. The reversal of 12788507 is 70588721.

12788507 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12788507 - 2¹⁶ = 12722971 is a prime.

It is a super-2 number, since 2×12788507² = 327091822578098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12788527) 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, 220463 + ... + 220520.

It is an arithmetic number, because the mean of its divisors is an integer number (3307380).

Almost surely, 2^12788507 is an apocalyptic number.

12788507 is a deficient number, since it is larger than the sum of its proper divisors (441013).

12788507 is an equidigital number, since it uses as much as digits as its factorization.

12788507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441012.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 12788507 is about 3576.1022077116. The cubic root of 12788507 is about 233.8513861425.

The spelling of 12788507 in words is "twelve million, seven hundred eighty-eight thousand, five hundred seven".