1156997 has 2 divisors, whose sum is σ = 1156998. Its totient is φ = 1156996.

The previous prime is 1156963. The next prime is 1157011. The reversal of 1156997 is 7996511.

1156997 is nontrivially palindromic in base 5.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 474721 = 826^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156997 - 2⁸ = 1156741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578498 + 578499.

It is an arithmetic number, because the mean of its divisors is an integer number (578499).

2^1156997 is an apocalyptic number.

It is an amenable number.

1156997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156997 is an equidigital number, since it uses as much as digits as its factorization.

1156997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 38.

The square root of 1156997 is about 1075.6379502416. The cubic root of 1156997 is about 104.9810094151.

The spelling of 1156997 in words is "one million, one hundred fifty-six thousand, nine hundred ninety-seven".