12729825 has 24 divisors (see below), whose sum is σ = 23386400. Its totient is φ = 6788880.

The previous prime is 12729817. The next prime is 12729839. The reversal of 12729825 is 52892721.

12729825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12729825 - 2³ = 12729817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12729825.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8755 + ... + 10104.

Almost surely, 2^12729825 is an apocalyptic number.

12729825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12729825 is a deficient number, since it is larger than the sum of its proper divisors (10656575).

12729825 is a wasteful number, since it uses less digits than its factorization.

12729825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18878 (or 18867 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12729825 is about 3567.8880307543. Note that the first 3 decimals coincide. The cubic root of 12729825 is about 233.4931501490.

The spelling of 12729825 in words is "twelve million, seven hundred twenty-nine thousand, eight hundred twenty-five".