12864491 has 2 divisors, whose sum is σ = 12864492. Its totient is φ = 12864490.

The previous prime is 12864479. The next prime is 12864499. The reversal of 12864491 is 19446821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12864491 - 2¹⁰ = 12863467 is a prime.

It is not a weakly prime, because it can be changed into another prime (12864499) 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 as a sum of consecutive naturals, namely, 6432245 + 6432246.

It is an arithmetic number, because the mean of its divisors is an integer number (6432246).

Almost surely, 2^12864491 is an apocalyptic number.

12864491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12864491 is an equidigital number, since it uses as much as digits as its factorization.

12864491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 12864491 is about 3586.7103312088. The cubic root of 12864491 is about 234.3136211658.

The spelling of 12864491 in words is "twelve million, eight hundred sixty-four thousand, four hundred ninety-one".