12288649 has 4 divisors (see below), whose sum is σ = 12935440. Its totient is φ = 11641860.

The previous prime is 12288631. The next prime is 12288659. The reversal of 12288649 is 94688221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94688221 = 47 ⋅2014643.

It is a cyclic number.

It is not a de Polignac number, because 12288649 - 2⁹ = 12288137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12288659) 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, 323367 + ... + 323404.

It is an arithmetic number, because the mean of its divisors is an integer number (3233860).

Almost surely, 2^12288649 is an apocalyptic number.

12288649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12288649 is a deficient number, since it is larger than the sum of its proper divisors (646791).

12288649 is an equidigital number, since it uses as much as digits as its factorization.

12288649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646790.

The product of its digits is 55296, while the sum is 40.

The square root of 12288649 is about 3505.5169376285. The cubic root of 12288649 is about 230.7639937643.

The spelling of 12288649 in words is "twelve million, two hundred eighty-eight thousand, six hundred forty-nine".