1161265 has 8 divisors (see below), whose sum is σ = 1592640. Its totient is φ = 796272.

The previous prime is 1161263. The next prime is 1161269. The reversal of 1161265 is 5621611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161265 - 2¹ = 1161263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16555 + ... + 16624.

It is an arithmetic number, because the mean of its divisors is an integer number (199080).

2^1161265 is an apocalyptic number.

It is an amenable number.

1161265 is a deficient number, since it is larger than the sum of its proper divisors (431375).

1161265 is an equidigital number, since it uses as much as digits as its factorization.

1161265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33191.

The product of its digits is 360, while the sum is 22.

The square root of 1161265 is about 1077.6200629164. The cubic root of 1161265 is about 105.1099377622.

Adding to 1161265 its reverse (5621611), we get a palindrome (6782876).

The spelling of 1161265 in words is "one million, one hundred sixty-one thousand, two hundred sixty-five".