12406289 has 4 divisors (see below), whose sum is σ = 14178624. Its totient is φ = 10633956.

The previous prime is 12406267. The next prime is 12406307. The reversal of 12406289 is 98260421.

12406289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 12406289 - 2¹⁶ = 12340753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12409289) 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, 886157 + ... + 886170.

It is an arithmetic number, because the mean of its divisors is an integer number (3544656).

Almost surely, 2^12406289 is an apocalyptic number.

It is an amenable number.

12406289 is a deficient number, since it is larger than the sum of its proper divisors (1772335).

12406289 is an equidigital number, since it uses as much as digits as its factorization.

12406289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772334.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 12406289 is about 3522.2562371298. The cubic root of 12406289 is about 231.4980290826.

The spelling of 12406289 in words is "twelve million, four hundred six thousand, two hundred eighty-nine".