12195787 has 2 divisors, whose sum is σ = 12195788. Its totient is φ = 12195786.

The previous prime is 12195779. The next prime is 12195793. The reversal of 12195787 is 78759121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12195787 - 2³ = 12195779 is a prime.

It is not a weakly prime, because it can be changed into another prime (12195767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6097893 + 6097894.

It is an arithmetic number, because the mean of its divisors is an integer number (6097894).

Almost surely, 2^12195787 is an apocalyptic number.

12195787 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195787 is an equidigital number, since it uses as much as digits as its factorization.

12195787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 12195787 is about 3492.2466980441. The cubic root of 12195787 is about 230.1812496947.

The spelling of 12195787 in words is "twelve million, one hundred ninety-five thousand, seven hundred eighty-seven".