12304505 has 4 divisors (see below), whose sum is σ = 14765412. Its totient is φ = 9843600.

The previous prime is 12304499. The next prime is 12304507. The reversal of 12304505 is 50540321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3613801 + 8690704 = 1901^2 + 2948^2 .

It is not a de Polignac number, because 12304505 - 2⁶ = 12304441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12304507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230446 + ... + 1230455.

It is an arithmetic number, because the mean of its divisors is an integer number (3691353).

Almost surely, 2^12304505 is an apocalyptic number.

It is an amenable number.

12304505 is a deficient number, since it is larger than the sum of its proper divisors (2460907).

12304505 is an equidigital number, since it uses as much as digits as its factorization.

12304505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460906.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 12304505 is about 3507.7777865766. Note that the first 4 decimals coincide. The cubic root of 12304505 is about 230.8632024266.

Adding to 12304505 its reverse (50540321), we get a palindrome (62844826).

The spelling of 12304505 in words is "twelve million, three hundred four thousand, five hundred five".