12261791 has 2 divisors, whose sum is σ = 12261792. Its totient is φ = 12261790.

The previous prime is 12261713. The next prime is 12261803. The reversal of 12261791 is 19716221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12261791 - 2¹⁰ = 12260767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12261701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130895 + 6130896.

It is an arithmetic number, because the mean of its divisors is an integer number (6130896).

Almost surely, 2^12261791 is an apocalyptic number.

12261791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261791 is an equidigital number, since it uses as much as digits as its factorization.

12261791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 12261791 is about 3501.6840234379. The cubic root of 12261791 is about 230.5957523200.

The spelling of 12261791 in words is "twelve million, two hundred sixty-one thousand, seven hundred ninety-one".