12770509 has 4 divisors (see below), whose sum is σ = 13011516. Its totient is φ = 12529504.

The previous prime is 12770507. The next prime is 12770551. The reversal of 12770509 is 90507721.

12770509 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 can be written as a sum of positive squares in 2 ways, for example, as 10956100 + 1814409 = 3310^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 12770509 - 2¹ = 12770507 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12770503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120424 + ... + 120529.

It is an arithmetic number, because the mean of its divisors is an integer number (3252879).

Almost surely, 2^12770509 is an apocalyptic number.

It is an amenable number.

12770509 is a deficient number, since it is larger than the sum of its proper divisors (241007).

12770509 is an equidigital number, since it uses as much as digits as its factorization.

12770509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241006.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 12770509 is about 3573.5848947520. The cubic root of 12770509 is about 233.7416304781.

The spelling of 12770509 in words is "twelve million, seven hundred seventy thousand, five hundred nine".