12428287 has 2 divisors, whose sum is σ = 12428288. Its totient is φ = 12428286.

The previous prime is 12428279. The next prime is 12428293. The reversal of 12428287 is 78282421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12428287 - 2³ = 12428279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12428237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214143 + 6214144.

It is an arithmetic number, because the mean of its divisors is an integer number (6214144).

Almost surely, 2^12428287 is an apocalyptic number.

12428287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12428287 is an equidigital number, since it uses as much as digits as its factorization.

12428287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 34.

The square root of 12428287 is about 3525.3775684315. The cubic root of 12428287 is about 231.6347738877.

The spelling of 12428287 in words is "twelve million, four hundred twenty-eight thousand, two hundred eighty-seven".