12642289 has 8 divisors (see below), whose sum is σ = 14267520. Its totient is φ = 11096400.

The previous prime is 12642283. The next prime is 12642293. The reversal of 12642289 is 98224621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12642289 - 2³ = 12642281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12642281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19497 + ... + 20134.

It is an arithmetic number, because the mean of its divisors is an integer number (1783440).

Almost surely, 2^12642289 is an apocalyptic number.

It is an amenable number.

12642289 is a deficient number, since it is larger than the sum of its proper divisors (1625231).

12642289 is a wasteful number, since it uses less digits than its factorization.

12642289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39671.

The product of its digits is 13824, while the sum is 34.

The square root of 12642289 is about 3555.5996681291. The cubic root of 12642289 is about 232.9567173865.

It can be divided in two parts, 1264 and 2289, that added together give a palindrome (3553).

The spelling of 12642289 in words is "twelve million, six hundred forty-two thousand, two hundred eighty-nine".