13122649 has 4 divisors (see below), whose sum is σ = 13190836. Its totient is φ = 13054464.

The previous prime is 13122647. The next prime is 13122653. The reversal of 13122649 is 94622131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6528025 + 6594624 = 2555^2 + 2568^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122649 - 2¹ = 13122647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13122647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33804 + ... + 34189.

It is an arithmetic number, because the mean of its divisors is an integer number (3297709).

Almost surely, 2^13122649 is an apocalyptic number.

It is an amenable number.

13122649 is a deficient number, since it is larger than the sum of its proper divisors (68187).

13122649 is an equidigital number, since it uses as much as digits as its factorization.

13122649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68186.

The product of its digits is 2592, while the sum is 28.

The square root of 13122649 is about 3622.5197031900. The cubic root of 13122649 is about 235.8706139862.

The spelling of 13122649 in words is "thirteen million, one hundred twenty-two thousand, six hundred forty-nine".