12390565 has 32 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 8366400.

The previous prime is 12390557. The next prime is 12390571. The reversal of 12390565 is 56509321.

It is not a de Polignac number, because 12390565 - 2³ = 12390557 is a prime.

It is a super-2 number, since 2×12390565² = 307052202038450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 74112 + ... + 74278.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^12390565 is an apocalyptic number.

It is an amenable number.

12390565 is a deficient number, since it is larger than the sum of its proper divisors (5027675).

12390565 is a wasteful number, since it uses less digits than its factorization.

12390565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

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

The square root of 12390565 is about 3520.0234374220. The cubic root of 12390565 is about 231.4001858589.

Adding to 12390565 its reverse (56509321), we get a palindrome (68899886).

The spelling of 12390565 in words is "twelve million, three hundred ninety thousand, five hundred sixty-five".