1181265 has 16 divisors (see below), whose sum is σ = 1922496. Its totient is φ = 619200.

The previous prime is 1181263. The next prime is 1181267. The reversal of 1181265 is 5621811.

It is an interprime number because it is at equal distance from previous prime (1181263) and next prime (1181267).

It is not a de Polignac number, because 1181265 - 2¹ = 1181263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1181263) 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 in 15 ways as a sum of consecutive naturals, for example, 270 + ... + 1560.

It is an arithmetic number, because the mean of its divisors is an integer number (120156).

2^1181265 is an apocalyptic number.

1181265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1181265 is a deficient number, since it is larger than the sum of its proper divisors (741231).

1181265 is a wasteful number, since it uses less digits than its factorization.

1181265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360.

The product of its digits is 480, while the sum is 24.

The square root of 1181265 is about 1086.8601565979. The cubic root of 1181265 is about 105.7099284266.

The spelling of 1181265 in words is "one million, one hundred eighty-one thousand, two hundred sixty-five".