12646225 has 12 divisors (see below), whose sum is σ = 15736716. Its totient is φ = 10081280.

The previous prime is 12646219. The next prime is 12646253. The reversal of 12646225 is 52264621.

12646225 is digitally balanced in base 2, 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 6 ways, for example, as 1089 + 12645136 = 33^2 + 3556^2 .

It is not a de Polignac number, because 12646225 - 2³ = 12646217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12646193 and 12646202.

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, 8109 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (1311393).

Almost surely, 2^12646225 is an apocalyptic number.

It is an amenable number.

12646225 is a deficient number, since it is larger than the sum of its proper divisors (3090491).

12646225 is a wasteful number, since it uses less digits than its factorization.

12646225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796 (or 1791 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 12646225 is about 3556.1531181882. The cubic root of 12646225 is about 232.9808908174.

The spelling of 12646225 in words is "twelve million, six hundred forty-six thousand, two hundred twenty-five".