12215179 has 2 divisors, whose sum is σ = 12215180. Its totient is φ = 12215178.

The previous prime is 12215173. The next prime is 12215191. The reversal of 12215179 is 97151221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12215179 - 2¹⁹ = 11690891 is a prime.

It is not a weakly prime, because it can be changed into another prime (12215173) 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 as a sum of consecutive naturals, namely, 6107589 + 6107590.

It is an arithmetic number, because the mean of its divisors is an integer number (6107590).

Almost surely, 2^12215179 is an apocalyptic number.

12215179 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215179 is an equidigital number, since it uses as much as digits as its factorization.

12215179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 12215179 is about 3495.0220314041. The cubic root of 12215179 is about 230.3031855470.

It can be divided in two parts, 1221 and 5179, that added together give a square (6400 = 80²).

The spelling of 12215179 in words is "twelve million, two hundred fifteen thousand, one hundred seventy-nine".