12775509 has 8 divisors (see below), whose sum is σ = 18926720. Its totient is φ = 8516988.

The previous prime is 12775489. The next prime is 12775519. The reversal of 12775509 is 90557721.

It is a de Polignac number, because none of the positive numbers 2^k-12775509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12775519) 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 7 ways as a sum of consecutive naturals, for example, 236557 + ... + 236610.

It is an arithmetic number, because the mean of its divisors is an integer number (2365840).

Almost surely, 2^12775509 is an apocalyptic number.

It is an amenable number.

12775509 is a deficient number, since it is larger than the sum of its proper divisors (6151211).

12775509 is an equidigital number, since it uses as much as digits as its factorization.

12775509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473176 (or 473170 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 12775509 is about 3574.2844039052. The cubic root of 12775509 is about 233.7721318898.

It can be divided in two parts, 1277 and 5509, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 12775509 in words is "twelve million, seven hundred seventy-five thousand, five hundred nine".