12215307 has 16 divisors (see below), whose sum is σ = 17726240. Its totient is φ = 7437312.

The previous prime is 12215297. The next prime is 12215317. The reversal of 12215307 is 70351221.

It is an interprime number because it is at equal distance from previous prime (12215297) and next prime (12215317).

It is not a de Polignac number, because 12215307 - 2⁷ = 12215179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12215317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2169 + ... + 5397.

It is an arithmetic number, because the mean of its divisors is an integer number (1107890).

Almost surely, 2^12215307 is an apocalyptic number.

12215307 is a deficient number, since it is larger than the sum of its proper divisors (5510933).

12215307 is a wasteful number, since it uses less digits than its factorization.

12215307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 12215307 is about 3495.0403431148. The cubic root of 12215307 is about 230.3039899753.

Adding to 12215307 its reverse (70351221), we get a palindrome (82566528).

The spelling of 12215307 in words is "twelve million, two hundred fifteen thousand, three hundred seven".