1165121 has 2 divisors, whose sum is σ = 1165122. Its totient is φ = 1165120.

The previous prime is 1165103. The next prime is 1165127. The reversal of 1165121 is 1215611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 83521 = 1040^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165121 - 2⁶ = 1165057 is a prime.

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 1165121.

It is not a weakly prime, because it can be changed into another prime (1165127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582560 + 582561.

It is an arithmetic number, because the mean of its divisors is an integer number (582561).

2^1165121 is an apocalyptic number.

It is an amenable number.

1165121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165121 is an equidigital number, since it uses as much as digits as its factorization.

1165121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 1165121 is about 1079.4077079584. The cubic root of 1165121 is about 105.2261490029.

The spelling of 1165121 in words is "one million, one hundred sixty-five thousand, one hundred twenty-one".