12281289 has 8 divisors (see below), whose sum is σ = 16413792. Its totient is φ = 8168160.

The previous prime is 12281257. The next prime is 12281303. The reversal of 12281289 is 98218221.

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

It is not a de Polignac number, because 12281289 - 2⁵ = 12281257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12281389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3292 + ... + 5949.

It is an arithmetic number, because the mean of its divisors is an integer number (2051724).

Almost surely, 2^12281289 is an apocalyptic number.

It is an amenable number.

12281289 is a deficient number, since it is larger than the sum of its proper divisors (4132503).

12281289 is an equidigital number, since it uses as much as digits as its factorization.

12281289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9687.

The product of its digits is 4608, while the sum is 33.

The square root of 12281289 is about 3504.4670065504. The cubic root of 12281289 is about 230.7179143246.

The spelling of 12281289 in words is "twelve million, two hundred eighty-one thousand, two hundred eighty-nine".