12884891 has 2 divisors, whose sum is σ = 12884892. Its totient is φ = 12884890.

The previous prime is 12884887. The next prime is 12884923. The reversal of 12884891 is 19848821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12884891 - 2² = 12884887 is a prime.

It is not a weakly prime, because it can be changed into another prime (12884591) 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, 6442445 + 6442446.

It is an arithmetic number, because the mean of its divisors is an integer number (6442446).

Almost surely, 2^12884891 is an apocalyptic number.

12884891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12884891 is an equidigital number, since it uses as much as digits as its factorization.

12884891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 41.

The square root of 12884891 is about 3589.5530362428. The cubic root of 12884891 is about 234.4374108401.

The spelling of 12884891 in words is "twelve million, eight hundred eighty-four thousand, eight hundred ninety-one".