12400489 has 2 divisors, whose sum is σ = 12400490. Its totient is φ = 12400488.

The previous prime is 12400457. The next prime is 12400511. The reversal of 12400489 is 98400421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7884864 + 4515625 = 2808^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400489 - 2⁵ = 12400457 is a prime.

It is not a weakly prime, because it can be changed into another prime (12400889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200244 + 6200245.

It is an arithmetic number, because the mean of its divisors is an integer number (6200245).

Almost surely, 2^12400489 is an apocalyptic number.

It is an amenable number.

12400489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400489 is an equidigital number, since it uses as much as digits as its factorization.

12400489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 12400489 is about 3521.4328049815. The cubic root of 12400489 is about 231.4619479772.

The spelling of 12400489 in words is "twelve million, four hundred thousand, four hundred eighty-nine".