1135566 has 32 divisors (see below), whose sum is σ = 2674080. Its totient is φ = 355968.

The previous prime is 1135531. The next prime is 1135597. The reversal of 1135566 is 6655311.

It is a happy number.

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

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 300 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (83565).

2^1135566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1135566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337040).

1135566 is an abundant number, since it is smaller than the sum of its proper divisors (1538514).

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

1135566 is a wasteful number, since it uses less digits than its factorization.

1135566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265 (or 1259 counting only the distinct ones).

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

The square root of 1135566 is about 1065.6293914866. The cubic root of 1135566 is about 104.3287795400.

The spelling of 1135566 in words is "one million, one hundred thirty-five thousand, five hundred sixty-six".