12685820 has 96 divisors (see below), whose sum is σ = 32686080. Its totient is φ = 4043520.

The previous prime is 12685763. The next prime is 12685837. The reversal of 12685820 is 2858621.

12685820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160541 + ... + 160619.

It is an arithmetic number, because the mean of its divisors is an integer number (340480).

Almost surely, 2^12685820 is an apocalyptic number.

12685820 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 12685820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16343040).

12685820 is an abundant number, since it is smaller than the sum of its proper divisors (20000260).

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

12685820 is a wasteful number, since it uses less digits than its factorization.

12685820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 161 counting only the distinct ones).

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

The square root of 12685820 is about 3561.7158786181. The cubic root of 12685820 is about 233.2237898503.

The spelling of 12685820 in words is "twelve million, six hundred eighty-five thousand, eight hundred twenty".