12512005 has 12 divisors (see below), whose sum is σ = 16504236. Its totient is φ = 9099200.

The previous prime is 12511991. The next prime is 12512029. The reversal of 12512005 is 50021521.

It can be written as a sum of positive squares in 2 ways, for example, as 2614689 + 9897316 = 1617^2 + 3146^2 .

It is not a de Polignac number, because 12512005 - 2⁹ = 12511493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12512005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9736 + ... + 10945.

It is an arithmetic number, because the mean of its divisors is an integer number (1375353).

Almost surely, 2^12512005 is an apocalyptic number.

It is an amenable number.

12512005 is a deficient number, since it is larger than the sum of its proper divisors (3992231).

12512005 is a wasteful number, since it uses less digits than its factorization.

12512005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20708 (or 20697 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 12512005 is about 3537.2312618770. The cubic root of 12512005 is about 232.1537142738.

Adding to 12512005 its reverse (50021521), we get a palindrome (62533526).

It can be divided in two parts, 125 and 12005, that multiplied together give a 4-th power (1500625 = 35⁴).

The spelling of 12512005 in words is "twelve million, five hundred twelve thousand, five".