12788539 has 16 divisors (see below), whose sum is σ = 14407200. Its totient is φ = 11319552.

The previous prime is 12788527. The next prime is 12788543. The reversal of 12788539 is 93588721.

12788539 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12788539 - 2⁷ = 12788411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12788495 and 12788504.

It is not an unprimeable number, because it can be changed into a prime (12788579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93279 + ... + 93415.

It is an arithmetic number, because the mean of its divisors is an integer number (900450).

Almost surely, 2^12788539 is an apocalyptic number.

12788539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12788539 is a deficient number, since it is larger than the sum of its proper divisors (1618661).

12788539 is an equidigital number, since it uses as much as digits as its factorization.

12788539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 173 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 12788539 is about 3576.1066818539. The cubic root of 12788539 is about 233.8515811936.

The spelling of 12788539 in words is "twelve million, seven hundred eighty-eight thousand, five hundred thirty-nine".