12685660 has 48 divisors (see below), whose sum is σ = 29042496. Its totient is φ = 4626432.

The previous prime is 12685643. The next prime is 12685663. The reversal of 12685660 is 6658621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24969 + ... + 25471.

It is an arithmetic number, because the mean of its divisors is an integer number (605052).

Almost surely, 2^12685660 is an apocalyptic number.

12685660 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 12685660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14521248).

12685660 is an abundant number, since it is smaller than the sum of its proper divisors (16356836).

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

12685660 is a wasteful number, since it uses less digits than its factorization.

12685660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 12685660 is about 3561.6934174631. The cubic root of 12685660 is about 233.2228093339. Note that the first 3 decimals are identical.

The spelling of 12685660 in words is "twelve million, six hundred eighty-five thousand, six hundred sixty".