12221264 has 20 divisors (see below), whose sum is σ = 25831680. Its totient is φ = 5555040.

The previous prime is 12221263. The next prime is 12221273. The reversal of 12221264 is 46212221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34544 + ... + 34895.

It is an arithmetic number, because the mean of its divisors is an integer number (1291584).

Almost surely, 2^12221264 is an apocalyptic number.

It is an amenable number.

12221264 is an abundant number, since it is smaller than the sum of its proper divisors (13610416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221264 is a wasteful number, since it uses less digits than its factorization.

12221264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69458 (or 69452 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 12221264 is about 3495.8924468582. The cubic root of 12221264 is about 230.3414210966.

Adding to 12221264 its reverse (46212221), we get a palindrome (58433485).

The spelling of 12221264 in words is "twelve million, two hundred twenty-one thousand, two hundred sixty-four".