12390287 has 24 divisors (see below), whose sum is σ = 15857856. Its totient is φ = 9592128.

The previous prime is 12390253. The next prime is 12390289. The reversal of 12390287 is 78209321.

It is not a de Polignac number, because 12390287 - 2¹⁰ = 12389263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33578 + ... + 33944.

It is an arithmetic number, because the mean of its divisors is an integer number (660744).

Almost surely, 2^12390287 is an apocalyptic number.

12390287 is a deficient number, since it is larger than the sum of its proper divisors (3467569).

12390287 is a wasteful number, since it uses less digits than its factorization.

12390287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 12390287 is about 3519.9839488270. The cubic root of 12390287 is about 231.3984552482.

The spelling of 12390287 in words is "twelve million, three hundred ninety thousand, two hundred eighty-seven".