12505189 has 2 divisors, whose sum is σ = 12505190. Its totient is φ = 12505188.

The previous prime is 12505151. The next prime is 12505219. The reversal of 12505189 is 98150521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10614564 + 1890625 = 3258^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 12505189 - 2⁹ = 12504677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12505189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12508189) 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, 6252594 + 6252595.

It is an arithmetic number, because the mean of its divisors is an integer number (6252595).

Almost surely, 2^12505189 is an apocalyptic number.

It is an amenable number.

12505189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12505189 is an equidigital number, since it uses as much as digits as its factorization.

12505189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 12505189 is about 3536.2676652086. The cubic root of 12505189 is about 232.1115508439. Note that the first 3 decimals are identical.

The spelling of 12505189 in words is "twelve million, five hundred five thousand, one hundred eighty-nine".