12258091 has 2 divisors, whose sum is σ = 12258092. Its totient is φ = 12258090.

The previous prime is 12258083. The next prime is 12258107. The reversal of 12258091 is 19085221.

It is a weak prime.

It is an emirp because it is prime and its reverse (19085221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12258091 - 2³ = 12258083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12258041) 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, 6129045 + 6129046.

It is an arithmetic number, because the mean of its divisors is an integer number (6129046).

Almost surely, 2^12258091 is an apocalyptic number.

12258091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12258091 is an equidigital number, since it uses as much as digits as its factorization.

12258091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12258091 is about 3501.1556663479. The cubic root of 12258091 is about 230.5725558686.

It can be divided in two parts, 1225 and 8091, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 12258091 in words is "twelve million, two hundred fifty-eight thousand, ninety-one".