12561264 has 40 divisors (see below), whose sum is σ = 36056720. Its totient is φ = 4186944.

The previous prime is 12561257. The next prime is 12561287. The reversal of 12561264 is 46216521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14107 + ... + 14970.

It is an arithmetic number, because the mean of its divisors is an integer number (901418).

Almost surely, 2^12561264 is an apocalyptic number.

It is an amenable number.

12561264 is an abundant number, since it is smaller than the sum of its proper divisors (23495456).

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

12561264 is a wasteful number, since it uses less digits than its factorization.

12561264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29094 (or 29082 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12561264 is about 3544.1873539642. The cubic root of 12561264 is about 232.4579736734.

Adding to 12561264 its reverse (46216521), we get a palindrome (58777785).

The spelling of 12561264 in words is "twelve million, five hundred sixty-one thousand, two hundred sixty-four".