12656249 has 6 divisors (see below), whose sum is σ = 12974190. Its totient is φ = 12345920.

The previous prime is 12656243. The next prime is 12656251. The reversal of 12656249 is 94265621.

It is a happy number.

12656249 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 3 ways, for example, as 822649 + 11833600 = 907^2 + 3440^2 .

It is not a de Polignac number, because 12656249 - 2¹² = 12652153 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12656243) 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, 2084 + ... + 5445.

It is an arithmetic number, because the mean of its divisors is an integer number (2162365).

Almost surely, 2^12656249 is an apocalyptic number.

It is an amenable number.

12656249 is a deficient number, since it is larger than the sum of its proper divisors (317941).

12656249 is an frugal number, since it uses more digits than its factorization.

12656249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7611 (or 7570 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 12656249 is about 3557.5622271438. The cubic root of 12656249 is about 233.0424318088.

The spelling of 12656249 in words is "twelve million, six hundred fifty-six thousand, two hundred forty-nine".