12040305 has 16 divisors (see below), whose sum is σ = 19368960. Its totient is φ = 6386688.

The previous prime is 12040291. The next prime is 12040309. The reversal of 12040305 is 50304021.

It is not a de Polignac number, because 12040305 - 2⁴ = 12040289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12040309) 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, 816 + ... + 4974.

It is an arithmetic number, because the mean of its divisors is an integer number (1210560).

Almost surely, 2^12040305 is an apocalyptic number.

12040305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12040305 is a deficient number, since it is larger than the sum of its proper divisors (7328655).

12040305 is a wasteful number, since it uses less digits than its factorization.

12040305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360.

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

The square root of 12040305 is about 3469.9142640705. The cubic root of 12040305 is about 229.1988826702.

Adding to 12040305 its reverse (50304021), we get a palindrome (62344326).

The spelling of 12040305 in words is "twelve million, forty thousand, three hundred five".