12865280 has 108 divisors (see below), whose sum is σ = 33909960. Its totient is φ = 4663296.

The previous prime is 12865253. The next prime is 12865289. The reversal of 12865280 is 8256821.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12865289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 559349 + ... + 559371.

Almost surely, 2^12865280 is an apocalyptic number.

12865280 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 12865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16954980).

12865280 is an abundant number, since it is smaller than the sum of its proper divisors (21044680).

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

12865280 is an equidigital number, since it uses as much as digits as its factorization.

12865280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 12865280 is about 3586.8203188897. The cubic root of 12865280 is about 234.3184113455.

The spelling of 12865280 in words is "twelve million, eight hundred sixty-five thousand, two hundred eighty".