12505091 has 2 divisors, whose sum is σ = 12505092. Its totient is φ = 12505090.

The previous prime is 12505079. The next prime is 12505093. The reversal of 12505091 is 19050521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12505091 - 2²² = 8310787 is a prime.

Together with 12505093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12505093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6252545 + 6252546.

It is an arithmetic number, because the mean of its divisors is an integer number (6252546).

Almost surely, 2^12505091 is an apocalyptic number.

12505091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12505091 is an equidigital number, since it uses as much as digits as its factorization.

12505091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 12505091 is about 3536.2538087643. The cubic root of 12505091 is about 232.1109445092.

The spelling of 12505091 in words is "twelve million, five hundred five thousand, ninety-one".