1165397 has 2 divisors, whose sum is σ = 1165398. Its totient is φ = 1165396.

The previous prime is 1165379. The next prime is 1165399. The reversal of 1165397 is 7935611.

Together with previous prime (1165379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1164241 + 1156 = 1079^2 + 34^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165397 is a prime.

Together with 1165399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582698 + 582699.

It is an arithmetic number, because the mean of its divisors is an integer number (582699).

2^1165397 is an apocalyptic number.

It is an amenable number.

1165397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165397 is an equidigital number, since it uses as much as digits as its factorization.

1165397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 32.

The square root of 1165397 is about 1079.5355482799. The cubic root of 1165397 is about 105.2344571884.

The spelling of 1165397 in words is "one million, one hundred sixty-five thousand, three hundred ninety-seven".