12649249 has 4 divisors (see below), whose sum is σ = 13085460. Its totient is φ = 12213040.

The previous prime is 12649237. The next prime is 12649253. The reversal of 12649249 is 94294621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94294621 = 1723 ⋅54727.

It can be written as a sum of positive squares in 2 ways, for example, as 7840000 + 4809249 = 2800^2 + 2193^2 .

It is a cyclic number.

It is not a de Polignac number, because 12649249 - 2¹⁵ = 12616481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12649349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218062 + ... + 218119.

It is an arithmetic number, because the mean of its divisors is an integer number (3271365).

Almost surely, 2^12649249 is an apocalyptic number.

It is an amenable number.

12649249 is a deficient number, since it is larger than the sum of its proper divisors (436211).

12649249 is an equidigital number, since it uses as much as digits as its factorization.

12649249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436210.

The product of its digits is 31104, while the sum is 37.

The square root of 12649249 is about 3556.5782713164. The cubic root of 12649249 is about 232.9994596806. Note that the first 3 decimals are identical.

The spelling of 12649249 in words is "twelve million, six hundred forty-nine thousand, two hundred forty-nine".