12860505 has 64 divisors (see below), whose sum is σ = 27033600. Its totient is φ = 5676480.

The previous prime is 12860501. The next prime is 12860531. The reversal of 12860505 is 50506821.

It is not a de Polignac number, because 12860505 - 2² = 12860501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12860501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29076 + ... + 29514.

It is an arithmetic number, because the mean of its divisors is an integer number (422400).

Almost surely, 2^12860505 is an apocalyptic number.

12860505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12860505 is an abundant number, since it is smaller than the sum of its proper divisors (14173095).

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

12860505 is a wasteful number, since it uses less digits than its factorization.

12860505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 12860505 is about 3586.1546257795. The cubic root of 12860505 is about 234.2894183538.

The spelling of 12860505 in words is "twelve million, eight hundred sixty thousand, five hundred five".