12646091 has 2 divisors, whose sum is σ = 12646092. Its totient is φ = 12646090.

The previous prime is 12646087. The next prime is 12646097. The reversal of 12646091 is 19064621.

It is a weak prime.

It is an emirp because it is prime and its reverse (19064621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12646091 - 2² = 12646087 is a prime.

It is not a weakly prime, because it can be changed into another prime (12646097) 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, 6323045 + 6323046.

It is an arithmetic number, because the mean of its divisors is an integer number (6323046).

Almost surely, 2^12646091 is an apocalyptic number.

12646091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646091 is an equidigital number, since it uses as much as digits as its factorization.

12646091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 12646091 is about 3556.1342775548. The cubic root of 12646091 is about 232.9800679223.

The spelling of 12646091 in words is "twelve million, six hundred forty-six thousand, ninety-one".