12545217 has 6 divisors (see below), whose sum is σ = 18120882. Its totient is φ = 8363472.

The previous prime is 12545209. The next prime is 12545219. The reversal of 12545217 is 71254521.

12545217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11553201 + 992016 = 3399^2 + 996^2 .

It is not a de Polignac number, because 12545217 - 2³ = 12545209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12545219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 696948 + ... + 696965.

It is an arithmetic number, because the mean of its divisors is an integer number (3020147).

Almost surely, 2^12545217 is an apocalyptic number.

It is an amenable number.

12545217 is a deficient number, since it is larger than the sum of its proper divisors (5575665).

12545217 is a wasteful number, since it uses less digits than its factorization.

12545217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393919 (or 1393916 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 12545217 is about 3541.9227828963. The cubic root of 12545217 is about 232.3589432282.

Adding to 12545217 its reverse (71254521), we get a palindrome (83799738).

The spelling of 12545217 in words is "twelve million, five hundred forty-five thousand, two hundred seventeen".