12195731 has 2 divisors, whose sum is σ = 12195732. Its totient is φ = 12195730.

The previous prime is 12195719. The next prime is 12195761. The reversal of 12195731 is 13759121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12195731 is a prime.

It is a super-2 number, since 2×12195731² = 297471709248722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12195694 and 12195703.

It is not a weakly prime, because it can be changed into another prime (12195761) 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, 6097865 + 6097866.

It is an arithmetic number, because the mean of its divisors is an integer number (6097866).

Almost surely, 2^12195731 is an apocalyptic number.

12195731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195731 is an equidigital number, since it uses as much as digits as its factorization.

12195731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 29.

The square root of 12195731 is about 3492.2386802737. The cubic root of 12195731 is about 230.1808973826.

The spelling of 12195731 in words is "twelve million, one hundred ninety-five thousand, seven hundred thirty-one".