12030305 has 16 divisors (see below), whose sum is σ = 17470080. Its totient is φ = 7763712.

The previous prime is 12030301. The next prime is 12030323. The reversal of 12030305 is 50303021.

12030305 = T₁₂₅₉ + T₁₂₆₀ + ... + T₁₂₇₃.

12030305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12030305 - 2² = 12030301 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12030305.

It is not an unprimeable number, because it can be changed into a prime (12030301) 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, 9515 + ... + 10704.

It is an arithmetic number, because the mean of its divisors is an integer number (1091880).

Almost surely, 2^12030305 is an apocalyptic number.

It is an amenable number.

12030305 is a deficient number, since it is larger than the sum of its proper divisors (5439775).

12030305 is a wasteful number, since it uses less digits than its factorization.

12030305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20248.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 12030305 is about 3468.4730069585. The cubic root of 12030305 is about 229.1354118624.

Adding to 12030305 its reverse (50303021), we get a palindrome (62333326).

The spelling of 12030305 in words is "twelve million, thirty thousand, three hundred five".