12509365 has 24 divisors (see below), whose sum is σ = 17417952. Its totient is φ = 8551680.

The previous prime is 12509363. The next prime is 12509377. The reversal of 12509365 is 56390521.

It is not a de Polignac number, because 12509365 - 2¹ = 12509363 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 (12509363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15502 + ... + 16288.

It is an arithmetic number, because the mean of its divisors is an integer number (725748).

Almost surely, 2^12509365 is an apocalyptic number.

It is an amenable number.

12509365 is a deficient number, since it is larger than the sum of its proper divisors (4908587).

12509365 is a wasteful number, since it uses less digits than its factorization.

12509365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 12509365 is about 3536.8580689646. The cubic root of 12509365 is about 232.1373851852.

Adding to 12509365 its reverse (56390521), we get a palindrome (68899886).

The spelling of 12509365 in words is "twelve million, five hundred nine thousand, three hundred sixty-five".