12272165 has 4 divisors (see below), whose sum is σ = 14726604. Its totient is φ = 9817728.

The previous prime is 12272159. The next prime is 12272167. The reversal of 12272165 is 56127221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56127221 = 281 ⋅199741.

It can be written as a sum of positive squares in 2 ways, for example, as 4532641 + 7739524 = 2129^2 + 2782^2 .

It is a cyclic number.

It is not a de Polignac number, because 12272165 - 2¹⁰ = 12271141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272167) 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 3 ways as a sum of consecutive naturals, for example, 1227212 + ... + 1227221.

It is an arithmetic number, because the mean of its divisors is an integer number (3681651).

Almost surely, 2^12272165 is an apocalyptic number.

It is an amenable number.

12272165 is a deficient number, since it is larger than the sum of its proper divisors (2454439).

12272165 is an equidigital number, since it uses as much as digits as its factorization.

12272165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454438.

The product of its digits is 1680, while the sum is 26.

The square root of 12272165 is about 3503.1649975415. The cubic root of 12272165 is about 230.6607652809.

Adding to 12272165 its reverse (56127221), we get a palindrome (68399386).

It can be divided in two parts, 1227216 and 5, that added together give a palindrome (1227221).

The spelling of 12272165 in words is "twelve million, two hundred seventy-two thousand, one hundred sixty-five".