12721264 has 10 divisors (see below), whose sum is σ = 24647480. Its totient is φ = 6360624.

The previous prime is 12721217. The next prime is 12721271. The reversal of 12721264 is 46212721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397524 + ... + 397555.

It is an arithmetic number, because the mean of its divisors is an integer number (2464748).

Almost surely, 2^12721264 is an apocalyptic number.

It is an amenable number.

12721264 is a deficient number, since it is larger than the sum of its proper divisors (11926216).

12721264 is an equidigital number, since it uses as much as digits as its factorization.

12721264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795087 (or 795081 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 12721264 is about 3566.6880996241. The cubic root of 12721264 is about 233.4407958516.

Adding to 12721264 its reverse (46212721), we get a palindrome (58933985).

The spelling of 12721264 in words is "twelve million, seven hundred twenty-one thousand, two hundred sixty-four".