12272018 has 32 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 5250960.

The previous prime is 12272009. The next prime is 12272023. The reversal of 12272018 is 81027221.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 12271984 and 12272002.

It is an unprimeable number.

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, 39821 + ... + 40127.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^12272018 is an apocalyptic number.

12272018 is a deficient number, since it is larger than the sum of its proper divisors (9016942).

12272018 is a wasteful number, since it uses less digits than its factorization.

12272018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12272018 is about 3503.1440164515. The cubic root of 12272018 is about 230.6598443006.

Adding to 12272018 its reverse (81027221), we get a palindrome (93299239).

The spelling of 12272018 in words is "twelve million, two hundred seventy-two thousand, eighteen".