12030405 has 8 divisors (see below), whose sum is σ = 19248672. Its totient is φ = 6416208.

The previous prime is 12030383. The next prime is 12030419. The reversal of 12030405 is 50403021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12030405 - 2⁸ = 12030149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 802027 = 12030405 / (1 + 2 + 0 + 3 + 0 + 4 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 400999 + ... + 401028.

It is an arithmetic number, because the mean of its divisors is an integer number (2406084).

Almost surely, 2^12030405 is an apocalyptic number.

12030405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12030405 is a deficient number, since it is larger than the sum of its proper divisors (7218267).

12030405 is an equidigital number, since it uses as much as digits as its factorization.

12030405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802035.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 12030405 is about 3468.4874224941. The cubic root of 12030405 is about 229.1360467446.

Adding to 12030405 its reverse (50403021), we get a palindrome (62433426).

The spelling of 12030405 in words is "twelve million, thirty thousand, four hundred five".