1166765 has 4 divisors (see below), whose sum is σ = 1400124. Its totient is φ = 933408.

The previous prime is 1166741. The next prime is 1166773. The reversal of 1166765 is 5676611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 917764 + 249001 = 958^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166765 - 2¹² = 1162669 is a prime.

It is a super-2 number, since 2×1166765² = 2722681130450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116672 + ... + 116681.

It is an arithmetic number, because the mean of its divisors is an integer number (350031).

2^1166765 is an apocalyptic number.

It is an amenable number.

1166765 is a deficient number, since it is larger than the sum of its proper divisors (233359).

1166765 is an equidigital number, since it uses as much as digits as its factorization.

1166765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233358.

The product of its digits is 7560, while the sum is 32.

The square root of 1166765 is about 1080.1689682638. The cubic root of 1166765 is about 105.2756175383.

The spelling of 1166765 in words is "one million, one hundred sixty-six thousand, seven hundred sixty-five".