12981500 has 48 divisors (see below), whose sum is σ = 32410560. Its totient is φ = 4449600.

The previous prime is 12981491. The next prime is 12981511. The reversal of 12981500 is 518921.

It is a happy number.

12981500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12981500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1646 + ... + 5354.

It is an arithmetic number, because the mean of its divisors is an integer number (675220).

Almost surely, 2^12981500 is an apocalyptic number.

12981500 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 12981500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16205280).

12981500 is an abundant number, since it is smaller than the sum of its proper divisors (19429060).

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

12981500 is a wasteful number, since it uses less digits than its factorization.

12981500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 12981500 is about 3602.9848736846. The cubic root of 12981500 is about 235.0218781502.

The spelling of 12981500 in words is "twelve million, nine hundred eighty-one thousand, five hundred".