12685500 has 72 divisors (see below), whose sum is σ = 40032720. Its totient is φ = 3381600.

The previous prime is 12685481. The next prime is 12685501. The reversal of 12685500 is 558621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3091 + ... + 5909.

It is an arithmetic number, because the mean of its divisors is an integer number (556010).

Almost surely, 2^12685500 is an apocalyptic number.

12685500 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 12685500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20016360).

12685500 is an abundant number, since it is smaller than the sum of its proper divisors (27347220).

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

12685500 is a wasteful number, since it uses less digits than its factorization.

12685500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844 (or 2829 counting only the distinct ones).

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

The square root of 12685500 is about 3561.6709561665. The cubic root of 12685500 is about 233.2218288093.

The spelling of 12685500 in words is "twelve million, six hundred eighty-five thousand, five hundred".