12725815 has 4 divisors (see below), whose sum is σ = 15270984. Its totient is φ = 10180648.

The previous prime is 12725813. The next prime is 12725819. The reversal of 12725815 is 51852721.

12725815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12725815 - 2¹ = 12725813 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12725813) 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, 1272577 + ... + 1272586.

It is an arithmetic number, because the mean of its divisors is an integer number (3817746).

Almost surely, 2^12725815 is an apocalyptic number.

12725815 is a deficient number, since it is larger than the sum of its proper divisors (2545169).

12725815 is an equidigital number, since it uses as much as digits as its factorization.

12725815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545168.

The product of its digits is 5600, while the sum is 31.

The square root of 12725815 is about 3567.3260293951. The cubic root of 12725815 is about 233.4686301506.

The spelling of 12725815 in words is "twelve million, seven hundred twenty-five thousand, eight hundred fifteen".