12275509 has 2 divisors, whose sum is σ = 12275510. Its totient is φ = 12275508.

The previous prime is 12275449. The next prime is 12275567. The reversal of 12275509 is 90557221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7717284 + 4558225 = 2778^2 + 2135^2 .

It is an emirp because it is prime and its reverse (90557221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12275509 - 2¹⁹ = 11751221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12275569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6137754 + 6137755.

It is an arithmetic number, because the mean of its divisors is an integer number (6137755).

Almost surely, 2^12275509 is an apocalyptic number.

It is an amenable number.

12275509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12275509 is an equidigital number, since it uses as much as digits as its factorization.

12275509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 12275509 is about 3503.6422477188. The cubic root of 12275509 is about 230.6817140309.

The spelling of 12275509 in words is "twelve million, two hundred seventy-five thousand, five hundred nine".