12181607 has 2 divisors, whose sum is σ = 12181608. Its totient is φ = 12181606.

The previous prime is 12181579. The next prime is 12181613. The reversal of 12181607 is 70618121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12181607 - 2¹⁸ = 11919463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12181627) 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, 6090803 + 6090804.

It is an arithmetic number, because the mean of its divisors is an integer number (6090804).

Almost surely, 2^12181607 is an apocalyptic number.

12181607 is a deficient number, since it is larger than the sum of its proper divisors (1).

12181607 is an equidigital number, since it uses as much as digits as its factorization.

12181607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 12181607 is about 3490.2158959010. The cubic root of 12181607 is about 230.0920047792.

Adding to 12181607 its reverse (70618121), we get a palindrome (82799728).

The spelling of 12181607 in words is "twelve million, one hundred eighty-one thousand, six hundred seven".