12308505 has 16 divisors (see below), whose sum is σ = 21484224. Its totient is φ = 5967680.

The previous prime is 12308467. The next prime is 12308507. The reversal of 12308505 is 50580321.

12308505 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12308505 - 2⁸ = 12308249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12308507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37134 + ... + 37463.

It is an arithmetic number, because the mean of its divisors is an integer number (1342764).

Almost surely, 2^12308505 is an apocalyptic number.

12308505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12308505 is a deficient number, since it is larger than the sum of its proper divisors (9175719).

12308505 is a wasteful number, since it uses less digits than its factorization.

12308505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74616.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12308505 is about 3508.3479017908. The cubic root of 12308505 is about 230.8882163750. Note that the first 3 decimals are identical.

Adding to 12308505 its reverse (50580321), we get a palindrome (62888826).

The spelling of 12308505 in words is "twelve million, three hundred eight thousand, five hundred five".