1166535 has 16 divisors (see below), whose sum is σ = 2074080. Its totient is φ = 622080.

The previous prime is 1166533. The next prime is 1166549. The reversal of 1166535 is 5356611.

It is a happy number.

1166535 is a `hidden beast` number, since 1 + 1 + 6 + 653 + 5 = 666.

It is not a de Polignac number, because 1166535 - 2¹ = 1166533 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1166499 and 1166508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4186 + ... + 4455.

It is an arithmetic number, because the mean of its divisors is an integer number (129630).

2^1166535 is an apocalyptic number.

1166535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166535 is a deficient number, since it is larger than the sum of its proper divisors (907545).

1166535 is an equidigital number, since it uses as much as digits as its factorization.

1166535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8655 (or 8649 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1166535 is about 1080.0624981917. The cubic root of 1166535 is about 105.2686995547.

The spelling of 1166535 in words is "one million, one hundred sixty-six thousand, five hundred thirty-five".