12864560 has 20 divisors (see below), whose sum is σ = 29910288. Its totient is φ = 5145792.

The previous prime is 12864559. The next prime is 12864569. The reversal of 12864560 is 6546821.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (12864569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80324 + ... + 80483.

Almost surely, 2^12864560 is an apocalyptic number.

12864560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12864560 is an abundant number, since it is smaller than the sum of its proper divisors (17045728).

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

12864560 is a wasteful number, since it uses less digits than its factorization.

12864560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160820 (or 160814 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 12864560 is about 3586.7199500379. The cubic root of 12864560 is about 234.3140400867.

The spelling of 12864560 in words is "twelve million, eight hundred sixty-four thousand, five hundred sixty".