12865560 has 64 divisors (see below), whose sum is σ = 39938400. Its totient is φ = 3311616.

The previous prime is 12865553. The next prime is 12865613. The reversal of 12865560 is 6556821.

It is a super-2 number, since 2×12865560² = 331045268227200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632 + ... + 5328.

Almost surely, 2^12865560 is an apocalyptic number.

12865560 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 12865560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19969200).

12865560 is an abundant number, since it is smaller than the sum of its proper divisors (27072840).

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

12865560 is a wasteful number, since it uses less digits than its factorization.

12865560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740 (or 3736 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 12865560 is about 3586.8593504625. The cubic root of 12865560 is about 234.3201112354.

The spelling of 12865560 in words is "twelve million, eight hundred sixty-five thousand, five hundred sixty".