1161275 has 6 divisors (see below), whose sum is σ = 1440012. Its totient is φ = 929000.

The previous prime is 1161269. The next prime is 1161289. The reversal of 1161275 is 5721611.

It is not a de Polignac number, because 1161275 - 2¹⁰ = 1160251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161275.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 23201 + ... + 23250.

It is an arithmetic number, because the mean of its divisors is an integer number (240002).

2^1161275 is an apocalyptic number.

1161275 is a deficient number, since it is larger than the sum of its proper divisors (278737).

1161275 is an equidigital number, since it uses as much as digits as its factorization.

1161275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46461 (or 46456 counting only the distinct ones).

The product of its digits is 420, while the sum is 23.

The square root of 1161275 is about 1077.6247027607. The cubic root of 1161275 is about 105.1102394723.

Adding to 1161275 its reverse (5721611), we get a palindrome (6882886).

The spelling of 1161275 in words is "one million, one hundred sixty-one thousand, two hundred seventy-five".