12191265 has 24 divisors (see below), whose sum is σ = 22052160. Its totient is φ = 6218784.

The previous prime is 12191239. The next prime is 12191269. The reversal of 12191265 is 56219121.

It is not a de Polignac number, because 12191265 - 2⁵ = 12191233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12191269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4855 + ... + 6924.

It is an arithmetic number, because the mean of its divisors is an integer number (918840).

Almost surely, 2^12191265 is an apocalyptic number.

12191265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12191265 is a deficient number, since it is larger than the sum of its proper divisors (9860895).

12191265 is a wasteful number, since it uses less digits than its factorization.

12191265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11813 (or 11810 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 12191265 is about 3491.5992038033. The cubic root of 12191265 is about 230.1527970199.

The spelling of 12191265 in words is "twelve million, one hundred ninety-one thousand, two hundred sixty-five".