1135281085 has 8 divisors (see below), whose sum is σ = 1362850776. Its totient is φ = 907882560.

The previous prime is 1135281079. The next prime is 1135281139. The reversal of 1135281085 is 5801825311.

It can be written as a sum of positive squares in 4 ways, for example, as 30184036 + 1105097049 = 5494^2 + 33243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1135281085 - 2⁵ = 1135281053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1135281085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27714 + ... + 55123.

It is an arithmetic number, because the mean of its divisors is an integer number (170356347).

Almost surely, 2^1135281085 is an apocalyptic number.

It is an amenable number.

1135281085 is a deficient number, since it is larger than the sum of its proper divisors (227569691).

1135281085 is an equidigital number, since it uses as much as digits as its factorization.

1135281085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85583.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 1135281085 is about 33693.9324656532. The cubic root of 1135281085 is about 1043.2005340088.

The spelling of 1135281085 in words is "one billion, one hundred thirty-five million, two hundred eighty-one thousand, eighty-five".