12655140 has 96 divisors (see below), whose sum is σ = 39553920. Its totient is φ = 3004416.

The previous prime is 12655127. The next prime is 12655141. The reversal of 12655140 is 4155621.

It is a self number, because there is not a number n which added to its sum of digits gives 12655140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19054 + ... + 19706.

It is an arithmetic number, because the mean of its divisors is an integer number (412020).

Almost surely, 2^12655140 is an apocalyptic number.

12655140 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 12655140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19776960).

12655140 is an abundant number, since it is smaller than the sum of its proper divisors (26898780).

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

12655140 is a wasteful number, since it uses less digits than its factorization.

12655140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12655140 is about 3557.4063585708. The cubic root of 12655140 is about 233.0356248524.

The spelling of 12655140 in words is "twelve million, six hundred fifty-five thousand, one hundred forty".