12400289 has 12 divisors (see below), whose sum is σ = 14147952. Its totient is φ = 10777800.

The previous prime is 12400247. The next prime is 12400303. The reversal of 12400289 is 98200421.

It is not a de Polignac number, because 12400289 - 2¹² = 12396193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12400489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4754 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (1178996).

Almost surely, 2^12400289 is an apocalyptic number.

It is an amenable number.

12400289 is a deficient number, since it is larger than the sum of its proper divisors (1747663).

12400289 is a wasteful number, since it uses less digits than its factorization.

12400289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12400289 is about 3521.4044073352. The cubic root of 12400289 is about 231.4607036005.

The spelling of 12400289 in words is "twelve million, four hundred thousand, two hundred eighty-nine".