12408289 has 4 divisors (see below), whose sum is σ = 12431124. Its totient is φ = 12385456.

The previous prime is 12408271. The next prime is 12408301. The reversal of 12408289 is 98280421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5475600 + 6932689 = 2340^2 + 2633^2 .

It is a cyclic number.

It is not a de Polignac number, because 12408289 - 2⁷ = 12408161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12408229) 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, 10582 + ... + 11695.

It is an arithmetic number, because the mean of its divisors is an integer number (3107781).

Almost surely, 2^12408289 is an apocalyptic number.

It is an amenable number.

12408289 is a deficient number, since it is larger than the sum of its proper divisors (22835).

12408289 is an equidigital number, since it uses as much as digits as its factorization.

12408289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22834.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 12408289 is about 3522.5401346188. The cubic root of 12408289 is about 231.5104682356.

The spelling of 12408289 in words is "twelve million, four hundred eight thousand, two hundred eighty-nine".