1161217 has 2 divisors, whose sum is σ = 1161218. Its totient is φ = 1161216.

The previous prime is 1161203. The next prime is 1161227. The reversal of 1161217 is 7121611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998001 + 163216 = 999^2 + 404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161217 is a prime.

It is equal to p₉₀₁₁₈ and since 1161217 and 90118 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161194 and 1161203.

It is not a weakly prime, because it can be changed into another prime (1161227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580608 + 580609.

It is an arithmetic number, because the mean of its divisors is an integer number (580609).

It is a Proth number, since it is equal to 567 ⋅ 2¹¹ + 1 and 567 < 2¹¹.

2^1161217 is an apocalyptic number.

It is an amenable number.

1161217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161217 is an equidigital number, since it uses as much as digits as its factorization.

1161217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 19.

The square root of 1161217 is about 1077.5977913860. The cubic root of 1161217 is about 105.1084895293.

Adding to 1161217 its reverse (7121611), we get a palindrome (8282828).

It can be divided in two parts, 1161 and 217, that added together give a triangular number (1378 = T₅₂).

The spelling of 1161217 in words is "one million, one hundred sixty-one thousand, two hundred seventeen".