12981860 has 12 divisors (see below), whose sum is σ = 27261948. Its totient is φ = 5192736.

The previous prime is 12981851. The next prime is 12981869. The reversal of 12981860 is 6818921.

It is an interprime number because it is at equal distance from previous prime (12981851) and next prime (12981869).

It can be written as a sum of positive squares in 2 ways, for example, as 6180196 + 6801664 = 2486^2 + 2608^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12981860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324527 + ... + 324566.

It is an arithmetic number, because the mean of its divisors is an integer number (2271829).

Almost surely, 2^12981860 is an apocalyptic number.

12981860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12981860 is an abundant number, since it is smaller than the sum of its proper divisors (14280088).

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

12981860 is a wasteful number, since it uses less digits than its factorization.

12981860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649102 (or 649100 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12981860 is about 3603.0348319160. The cubic root of 12981860 is about 235.0240506545.

The spelling of 12981860 in words is "twelve million, nine hundred eighty-one thousand, eight hundred sixty".