1165266 has 20 divisors (see below), whose sum is σ = 2611422. Its totient is φ = 388368.

The previous prime is 1165223. The next prime is 1165273. The reversal of 1165266 is 6625611.

It is a happy number.

1165266 is a `hidden beast` number, since 1 + 1 + 652 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1147041 + 18225 = 1071^2 + 135^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

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 9 ways as a sum of consecutive naturals, for example, 3435 + ... + 3758.

2^1165266 is an apocalyptic number.

1165266 is an abundant number, since it is smaller than the sum of its proper divisors (1446156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165266 is an equidigital number, since it uses as much as digits as its factorization.

1165266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7207 (or 7198 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1165266 is about 1079.4748723338. The cubic root of 1165266 is about 105.2305139741.

It can be divided in two parts, 1165 and 266, that added together give a triangular number (1431 = T₅₃).

The spelling of 1165266 in words is "one million, one hundred sixty-five thousand, two hundred sixty-six".