12156797 has 2 divisors, whose sum is σ = 12156798. Its totient is φ = 12156796.

The previous prime is 12156791. The next prime is 12156799. The reversal of 12156797 is 79765121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 143641 = 3466^2 + 379^2 .

It is an emirp because it is prime and its reverse (79765121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12156797 - 2⁶ = 12156733 is a prime.

Together with 12156799, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12156797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12156791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078398 + 6078399.

It is an arithmetic number, because the mean of its divisors is an integer number (6078399).

Almost surely, 2^12156797 is an apocalyptic number.

It is an amenable number.

12156797 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156797 is an equidigital number, since it uses as much as digits as its factorization.

12156797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 38.

The square root of 12156797 is about 3486.6598629634. The cubic root of 12156797 is about 229.9356909052.

The spelling of 12156797 in words is "twelve million, one hundred fifty-six thousand, seven hundred ninety-seven".