12261187 has 2 divisors, whose sum is σ = 12261188. Its totient is φ = 12261186.

The previous prime is 12261181. The next prime is 12261211. The reversal of 12261187 is 78116221.

12261187 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (78116221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12261187 - 2⁷ = 12261059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12261181) 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, 6130593 + 6130594.

It is an arithmetic number, because the mean of its divisors is an integer number (6130594).

Almost surely, 2^12261187 is an apocalyptic number.

12261187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261187 is an equidigital number, since it uses as much as digits as its factorization.

12261187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 12261187 is about 3501.5977781579. The cubic root of 12261187 is about 230.5919659748.

The spelling of 12261187 in words is "twelve million, two hundred sixty-one thousand, one hundred eighty-seven".