12612091 has 2 divisors, whose sum is σ = 12612092. Its totient is φ = 12612090.

The previous prime is 12612001. The next prime is 12612109. The reversal of 12612091 is 19021621.

Together with next prime (12612109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12612091 - 2¹¹ = 12610043 is a prime.

It is not a weakly prime, because it can be changed into another prime (12612001) 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, 6306045 + 6306046.

It is an arithmetic number, because the mean of its divisors is an integer number (6306046).

Almost surely, 2^12612091 is an apocalyptic number.

12612091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12612091 is an equidigital number, since it uses as much as digits as its factorization.

12612091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 12612091 is about 3551.3505881566. The cubic root of 12612091 is about 232.7710855060.

The spelling of 12612091 in words is "twelve million, six hundred twelve thousand, ninety-one".