12271664 has 20 divisors (see below), whose sum is σ = 24024504. Its totient is φ = 6071808.

The previous prime is 12271643. The next prime is 12271681. The reversal of 12271664 is 46617221.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2402 + ... + 5505.

Almost surely, 2^12271664 is an apocalyptic number.

It is an amenable number.

12271664 is a deficient number, since it is larger than the sum of its proper divisors (11752840).

12271664 is an equidigital number, since it uses as much as digits as its factorization.

12271664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012 (or 8006 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 12271664 is about 3503.0934900456. The cubic root of 12271664 is about 230.6576263994.

Adding to 12271664 its reverse (46617221), we get a palindrome (58888885).

The spelling of 12271664 in words is "twelve million, two hundred seventy-one thousand, six hundred sixty-four".