12289138 has 8 divisors (see below), whose sum is σ = 18460332. Its totient is φ = 6135696.

The previous prime is 12289133. The next prime is 12289159. The reversal of 12289138 is 83198221.

12289138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11242609 + 1046529 = 3353^2 + 1023^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12289133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2545 + ... + 5572.

Almost surely, 2^12289138 is an apocalyptic number.

12289138 is a deficient number, since it is larger than the sum of its proper divisors (6171194).

12289138 is an equidigital number, since it uses as much as digits as its factorization.

12289138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876.

The product of its digits is 6912, while the sum is 34.

The square root of 12289138 is about 3505.5866841372. The cubic root of 12289138 is about 230.7670546404.

The spelling of 12289138 in words is "twelve million, two hundred eighty-nine thousand, one hundred thirty-eight".