12525805 has 4 divisors (see below), whose sum is σ = 15030972. Its totient is φ = 10020640.

The previous prime is 12525803. The next prime is 12525811. The reversal of 12525805 is 50852521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2653641 + 9872164 = 1629^2 + 3142^2 .

It is not a de Polignac number, because 12525805 - 2¹ = 12525803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525803) 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, 1252576 + ... + 1252585.

It is an arithmetic number, because the mean of its divisors is an integer number (3757743).

Almost surely, 2^12525805 is an apocalyptic number.

It is an amenable number.

12525805 is a deficient number, since it is larger than the sum of its proper divisors (2505167).

12525805 is an equidigital number, since it uses as much as digits as its factorization.

12525805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505166.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 12525805 is about 3539.1814025280. The cubic root of 12525805 is about 232.2390335103.

The spelling of 12525805 in words is "twelve million, five hundred twenty-five thousand, eight hundred five".