1161001 has 2 divisors, whose sum is σ = 1161002. Its totient is φ = 1161000.

The previous prime is 1160989. The next prime is 1161007. The reversal of 1161001 is 1001611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 488601 = 820^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161001 - 2¹¹ = 1158953 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1161007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580500 + 580501.

It is an arithmetic number, because the mean of its divisors is an integer number (580501).

2^1161001 is an apocalyptic number.

It is an amenable number.

1161001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161001 is an equidigital number, since it uses as much as digits as its factorization.

1161001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1161001 is about 1077.4975638024. The cubic root of 1161001 is about 105.1019719873.

Adding to 1161001 its reverse (1001611), we get a palindrome (2162612).

The spelling of 1161001 in words is "one million, one hundred sixty-one thousand, one".