12866560 has 88 divisors (see below), whose sum is σ = 35372160. Its totient is φ = 4399104.

The previous prime is 12866551. The next prime is 12866561. The reversal of 12866560 is 6566821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12866561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35661 + ... + 36019.

Almost surely, 2^12866560 is an apocalyptic number.

12866560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12866560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17686080).

12866560 is an abundant number, since it is smaller than the sum of its proper divisors (22505600).

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

12866560 is an equidigital number, since it uses as much as digits as its factorization.

12866560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 12866560 is about 3586.9987454695. The cubic root of 12866560 is about 234.3261820695.

The spelling of 12866560 in words is "twelve million, eight hundred sixty-six thousand, five hundred sixty".