12815900 has 18 divisors (see below), whose sum is σ = 27810720. Its totient is φ = 5126320.

The previous prime is 12815867. The next prime is 12815923. The reversal of 12815900 is 951821.

It is a happy number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 12815900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63980 + ... + 64179.

It is an arithmetic number, because the mean of its divisors is an integer number (1545040).

Almost surely, 2^12815900 is an apocalyptic number.

12815900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12815900 is an abundant number, since it is smaller than the sum of its proper divisors (14994820).

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

12815900 is a wasteful number, since it uses less digits than its factorization.

12815900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128173 (or 128166 counting only the distinct ones).

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

The square root of 12815900 is about 3579.9301669167. The cubic root of 12815900 is about 234.0182370670.

The spelling of 12815900 in words is "twelve million, eight hundred fifteen thousand, nine hundred".