12786560 has 32 divisors (see below), whose sum is σ = 30569400. Its totient is φ = 5114368.

The previous prime is 12786559. The next prime is 12786581. The reversal of 12786560 is 6568721.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×12786560² = 326992233267200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12786560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9350 + ... + 10629.

Almost surely, 2^12786560 is an apocalyptic number.

12786560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12786560 is an abundant number, since it is smaller than the sum of its proper divisors (17782840).

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

12786560 is an equidigital number, since it uses as much as digits as its factorization.

12786560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998 (or 19986 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 12786560 is about 3575.8299735866. The cubic root of 12786560 is about 233.8395178883.

The spelling of 12786560 in words is "twelve million, seven hundred eighty-six thousand, five hundred sixty".